CAPE Pure Mathematics Unit 2 · May/June 2017 · Paper 1 · Question Q20
Which of the following series are arithmetic series?
I. \sum_{r=1}^n (7 + 3r)
II. \sum_{r=1}^n 2(3^r)
III. \sum_{r=1}^n \log_{10}(r + 1)
IV. \sum_{r=1}^n \log_{10} 3^{(r+1)}
- (A)I and III only
- (B)I and IV only
- (C)III and IV only
- (D)I, II and IV only
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