FunctionsQuestion bankFunctionsSubstitute a complete input expressionBack to lesson exercise · What can go in, and what can come out?Functions questionsLearn the method: What can go in, and what can come out?Substitute a complete input expressionThe function fff is defined by f:x↦3x2+1f:x\mapsto3x^2+1f:x↦3x2+1, x∈Rx\in\mathbb Rx∈R. Find (a) f(3)f(3)f(3), (b) f(5x)f(5x)f(5x), (c) f(2y+1)f(2y+1)f(2y+1).CJC · Functions · Example 1After your attemptRecord how it went before checking the working. You can update this later.Record confidence for 3 parts(a) Evaluate at 3How did this part go?Got itShakyMissed it(b) Substitute 5xHow did this part go?Got itShakyMissed it(c) Substitute 2y+1How did this part go?Got itShakyMissed itCheck your workingSolutionRead solution
Substitute a complete input expressionThe function fff is defined by f:x↦3x2+1f:x\mapsto3x^2+1f:x↦3x2+1, x∈Rx\in\mathbb Rx∈R. Find (a) f(3)f(3)f(3), (b) f(5x)f(5x)f(5x), (c) f(2y+1)f(2y+1)f(2y+1).CJC · Functions · Example 1After your attemptRecord how it went before checking the working. You can update this later.Record confidence for 3 parts(a) Evaluate at 3How did this part go?Got itShakyMissed it(b) Substitute 5xHow did this part go?Got itShakyMissed it(c) Substitute 2y+1How did this part go?Got itShakyMissed itCheck your workingSolutionRead solution