Calculate the value of .

MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series

Problem

Calculate the value of 4∑k=15(2k−1)  −  3∑k=152k−14\displaystyle\sum_{k=1}^{5}(2k-1)\; -\; 3\displaystyle\sum_{k=1}^{5}2^{k-1}.

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