CAPE Pure Mathematics Unit 2 · May/June 2019 · Paper 1 · Question Q21
Which of the following series are arithmetic series?
\nI. \sum_{r=1}^n (7 + 3r)
\nII. \sum_{r=1}^n 2(3^r)
\nIII. \sum_{r=1}^n \log_{10} 3^{(r+1)}
- (A)I only
- (B)I and III only
- (C)II and III only
- (D)I, II and III
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