Expand and evaluate:

MATHEMATICS · Multi-part · CBSE · Mathematics · Sequences and Series · Sequences and Series

Problem

Expand and evaluate: (1) (a) ∑k=17(k+1)\sum_{k=1}^{7}(k+1) (2) (b) ∑k=1512k\sum_{k=1}^{5}\frac{1}{2^k}

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