Question

The value of the sum of 10 term of the series
$S_{10}=\frac{1}{2^2-1}+\frac{1}{4^2-1}+\frac{1}{6^2-1}+...$

• A. $\frac{11}{21}$
• B. $\frac{9}{10}$
• C. $\frac{21}{10}$
• D. $\frac{10}{21}$

Answer 1

Answer: (D)

$\frac{10}{21}$

Answer 2

The correct option is (D):$\frac{10}{21}$.