Answer
$\displaystyle \sum_{i=1}^{15}\frac{5}{1+i}$
Work Step by Step
$\frac{5}{1+1}+\frac{5}{1+2}+\frac{5}{1+3}+...+\frac{5}{1+15}=\displaystyle \sum_{i=1}^{15}\frac{5}{1+i}$
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