PorismaSource review

Your source-to-article checklist

Source review · Differential equations

All source-review topics · Coverage and provenance · Student practice

Every question has a place in the ledger. That does not prove every item is accurate or complete. Use these links to compare the native question, subparts, working, teaching notes, tables and diagrams with your private originals.

“Source comparison recorded” means a visual source-comparison pass is documented. “Mapped” or “generated” describes an ingestion step. Mathematical review, browser interaction tests and settled screenshot review are separate checks.

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18 question records

Optional ticks record your own inspection in this browser only. They do not change the conversion or mathematical-review claims.

10 · Differential equations

Edition metadata →

10-01 · A removable extension of the differential equationQuestion pp.1 / Solution pp.1

Question and explanations → · Complete native source article →

[2010/MI/Prelim/I/11(b) (modified)]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

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2 page-item records.

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Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

The original equation is undefined at x=0. The requested initial condition uses the smooth extension y′=2x/(1+x²); this interpretation follows the printed working rather than treating the displayed equation as defined there.

Essential answer conditions and source qualifications

Original DE requires $x\ne0$ on each connected interval.

Uses the intended smooth extension through 0.

Exact private source page references

10 DE.pdf · p.1
10 DE.pdf · p.8
10 DE sol.pdf · p.1

10-02 · A second-order equation needs two constantsQuestion pp.1 / Solution pp.1

Question and explanations → · Complete native source article →

[modified 2011/RVHS/Promo/12ai]. Printed/task labels inventoried: general solution.

Question / subparts

Source comparison recorded

2 page-item records.

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Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

1 page-item record.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

general solution

On intervals where $\cos x\ne0$ .

Exact private source page references

10 DE.pdf · p.1
10 DE.pdf · p.8
10 DE sol.pdf · p.1

10-03 · The product substitution absorbs a linear termQuestion pp.1 / Solution pp.2

Question and explanations → · Complete native source article →

[2012/RVHS/Prelim/II/1 (modified)]. Printed/task labels inventoried: substitution, general solution, i, ii.

Question / subparts

Source comparison recorded

2 page-item records.

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Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

4 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

general solution

$x\ne0$ ; includes $A=0$ .

Exact private source page references

10 DE.pdf · p.1
10 DE.pdf · p.8
10 DE sol.pdf · p.2

10-04 · Bacteria growth after a product substitutionQuestion pp.1 / Solution pp.3

Question and explanations → · Complete native source article →

[2012/NJC/Prelim/I/4]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

$t\ge0$ in hours.

Exact private source page references

10 DE.pdf · p.1
10 DE.pdf · p.8
10 DE sol.pdf · p.3

10-05 · Draining a sphere: height is not volumeQuestion pp.1 / Solution pp.4

Question and explanations → · Complete native source article →

[2019/NYJC/Prelim/I/7]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.1
10 DE.pdf · p.8
10 DE sol.pdf · p.4

10-06 · Drag models approach different terminal speedsQuestion pp.2 / Solution pp.5, 6, 7, 8

Question and explanations → · Complete native source article →

[2024/TJC/Prelim/I/11]. Printed/task labels inventoried: a.i, a.ii, b.i, b.ii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

5 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

b.ii

Positive equilibrium approached from rest; $k>0$ .

Exact private source page references

10 DE.pdf · p.2
10 DE.pdf · p.8
10 DE sol.pdf · p.5
10 DE sol.pdf · p.6
10 DE sol.pdf · p.7
10 DE sol.pdf · p.8

10-07 · Calibrate exponential decayQuestion pp.2 / Solution pp.8, 9

Question and explanations → · Complete native source article →

[modified 2015/YJC/Promo/9]. Printed/task labels inventoried: DE, i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.2
10 DE.pdf · p.8
10 DE sol.pdf · p.8
10 DE sol.pdf · p.9

10-08 · Cooling toward ambient temperatureQuestion pp.2 / Solution pp.9, 10

Question and explanations → · Complete native source article →

[2023/RI/Prelim/I/6]. Printed/task labels inventoried: a, b, c.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

4 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

Under the exercise rule, store before the 60°C crossing (t≈212.04 min).

Exact private source page references

10 DE.pdf · p.2
10 DE.pdf · p.8
10 DE sol.pdf · p.9
10 DE sol.pdf · p.10

10-09 · Constant input shifts a decay equilibriumQuestion pp.3 / Solution pp.11, 12

Question and explanations → · Complete native source article →

[2022/RI/Prelim/I/10]. Printed/task labels inventoried: i, ii, iii, iv, v.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

4 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Printed solution p.12 / question answer p.8 uses 0.35<μ<0.5. Inclusive healthy bounds permit both endpoints. Counterexamples μ=0.35 and μ=0.5 remain within the interval for every finite t; exclude them only if the limiting equilibrium must also be strictly interior.

Essential answer conditions and source qualifications

Source prints strict bounds. Inclusive healthy limits admit both endpoints; exclude them only if the limiting equilibrium must also be strictly interior.

Exact private source page references

10 DE.pdf · p.3
10 DE.pdf · p.8
10 DE sol.pdf · p.11
10 DE sol.pdf · p.12

10-10 · An exponential height law makes the rod never landQuestion pp.3 / Solution pp.13

Question and explanations → · Complete native source article →

[2012/HCI/I/8]. Printed/task labels inventoried: i, ii, iii, iv.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

4 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.3
10 DE.pdf · p.8
10 DE sol.pdf · p.12
10 DE sol.pdf · p.13

10-11 · Keep population units consistentQuestion pp.4 / Solution pp.14, 15

Question and explanations → · Complete native source article →

[2019/RVHS/Prelim/I/10]. Printed/task labels inventoried: i, ii, iii, iv, v.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.4
10 DE.pdf · p.9
10 DE sol.pdf · p.14
10 DE sol.pdf · p.15

10-12 · A decreasing forest model stops at extinctionQuestion pp.4 / Solution pp.16, 17

Question and explanations → · Complete native source article →

[2020/CJC/Prelim/II/4]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

iii

Population interpretation only $0\le t\le t_*$ .

Exact private source page references

10 DE.pdf · p.4
10 DE.pdf · p.9
10 DE sol.pdf · p.15
10 DE sol.pdf · p.16
10 DE sol.pdf · p.17

10-13 · A square-root removal law has an implicit solutionQuestion pp.5 / Solution pp.18, 19

Question and explanations → · Complete native source article →

[2023/RVHS/Prelim/I/12]. Printed/task labels inventoried: i, ii, iii, iv.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

iii

$x=\sqrt{Q/3}\in[0,5)$ .

Exact private source page references

10 DE.pdf · p.5
10 DE.pdf · p.9
10 DE sol.pdf · p.17
10 DE sol.pdf · p.18
10 DE sol.pdf · p.19

10-14 · Product substitution and a logistic epidemicQuestion pp.5 / Solution pp.20, 21, 22

Question and explanations → · Complete native source article →

[2017/RVHS/Promo/10]. Printed/task labels inventoried: a.substitution, a.solution, b.DE, b.solution.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

4 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

1 page-item record.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

a.solution

$x\ne0$ ; $A=0$ includes $y=-1/x$ lost by division.

Exact private source page references

10 DE.pdf · p.5
10 DE.pdf · p.9
10 DE sol.pdf · p.20
10 DE sol.pdf · p.21
10 DE sol.pdf · p.22

10-15 · Compare unbounded growth with a carrying capacityQuestion pp.6 / Solution pp.22, 23

Question and explanations → · Complete native source article →

[2020/ACJC/Prelim/II/2]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

1 page-item record.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.6
10 DE.pdf · p.9
10 DE sol.pdf · p.22
10 DE sol.pdf · p.23

10-16 · A declining species and an increasing logistic speciesQuestion pp.6 / Solution pp.23, 24, 25, 26

Question and explanations → · Complete native source article →

[2021/TJC/Prelim/I/10]. Printed/task labels inventoried: a.i, a.ii, b.i, b.ii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

5 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

6 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

3 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

a.ii

Stop the population model at extinction.

Exact private source page references

10 DE.pdf · p.6
10 DE.pdf · p.9
10 DE sol.pdf · p.23
10 DE sol.pdf · p.24
10 DE sol.pdf · p.25
10 DE sol.pdf · p.26

10-17 · Separate the formal model from inconsistent pump directionsQuestion pp.6 / Solution pp.27, 28

Question and explanations → · Complete native source article →

[2022/ASRJC/Prelim/I/11]. Printed/task labels inventoried: i, ii, iii.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

2 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Question PDF p.6 (printed73), solution pp.27–28: the printed k=−11/50 is algebraically consistent with the given derivative datum but incompatible with positive inflow ∝h² and positive outflow ∝h. The original wording and solution are preserved; the logistic interpretation is explicitly conditional.

Essential answer conditions and source qualifications

Incompatible with positive printed inflow∝h² and outflow∝h; no positive physical constants satisfy all data.

iii

Conditional algebraic model, not a physically consistent solution of the printed pump description.

Exact private source page references

10 DE.pdf · p.6
10 DE.pdf · p.9
10 DE sol.pdf · p.26
10 DE sol.pdf · p.27
10 DE sol.pdf · p.28

10-18 · Logistic proportions and the first whole weekQuestion pp.7 / Solution pp.29, 30, 31, 32, 33

Question and explanations → · Complete native source article →

[2021/HCI/Prelim/I/10]. Printed/task labels inventoried: i, ii, iii, iv, v.

Question / subparts

Source comparison recorded

2 page-item records.

Inspect native target → I compared this with the original

Solution steps

Source comparison recorded

6 page-item records.

Inspect native target → I compared this with the original

Teacher notes

Source comparison recorded

3 page-item records.

Inspect native target → I compared this with the original

Tables

No item inventoried — owner check needed

0 page-item records.

Inspect native target → I compared this with the original

Diagrams

Source comparison recorded

4 page-item records. Native SVG generated; rendering is checked separately

Inspect native target → I compared this with the original

Short answer: source-compared
Mathematical correctness: reviewed. Recorded mathematical review is a first pass; it is not independent expert certification.
Final interactions: Question-first question/short-answer pixels reviewed at320px on baseline9f03a4f. This polish pass adds all248 open-guided DOM reflow checks; all31 added given-figure placements inspected at320px; responsive plots and selected updated layouts checked separately. This is not an exhaustive new working/teacher-note pixel audit.
Rendered source content: Settled source-content screenshots reviewed

Essential answer conditions and source qualifications

No separate condition recorded. Check the full question, native working and printed assumptions.

Exact private source page references

10 DE.pdf · p.7
10 DE.pdf · p.9
10 DE sol.pdf · p.29
10 DE sol.pdf · p.30
10 DE sol.pdf · p.31
10 DE sol.pdf · p.32
10 DE sol.pdf · p.33

An empty omission list is not a completeness certificate. Add any issue you find to the article or page-item record before calling that part finished.