Question

$\sum _{r=1}^n\frac{r}{1,3,5,\mathrm{7..........}(2r+1)}$ is equal to

• A. $\frac{1}{2}[1-\frac{1}{1,3,\mathrm{5..............}(2n-1)}]$
• B. $\frac{1}{4}[1-\frac{1}{1,3,\mathrm{5..............}(2n-1)}]$
• C. $\frac{1}{4}[1+\frac{1}{1,3,\mathrm{5..............}(2n-1)}]$
• D. none of these

Answer 1

The correct option is D none of these

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