Question
Write out each series and evaluate it.$$\sum_{i=1}^{5}(-1)^{i} \cdot i$$
Step 1
Step 1: The given series is $$ \sum_{i=1}^{5}(-1)^{i} \cdot i $$ This means we are summing up the terms where each term is $(-1)^{i} \cdot i$ for $i$ from 1 to 5. Show more…
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