Identify the correct sigma notation for the sum .

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

Problem

Identify the correct sigma notation for the sum 7+7+7+77+7+7+7. (a) ∑k=147k\displaystyle\sum_{k=1}^{4} 7k (b) ∑k=17k\displaystyle\sum_{k=1}^{7} k (c) ∑k=147\displaystyle\sum_{k=1}^{4} 7 (d) ∑k=03(7+k)\displaystyle\sum_{k=0}^{3} (7+k)

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