A hint to get started
Evaluate a sum with three different structures
Evaluate , giving your answer in terms of . marks
[2013/AJC/Promo/1]
CJC · Review problems · Question 1
The lower index is 2, so count n−1 terms.
Read the worked solution
A hint to get started
Evaluate r=2∑n(2−r+2nr+n2), giving your answer in terms of n.4 marks
[2013/AJC/Promo/1]
CJC · Review problems · Question 1
The lower index is 2, so count n−1 terms.