Find the value of .

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

Find the value of ∑k=1n1\displaystyle \sum_{k=1}^{n} 1. (a) n(n+1)2\dfrac{n(n+1)}{2} (b) n2n^{2} (c) nn (d) n+1n+1

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