Question

If $S_n$ stands for sum to n-terms of a G.P. with ‘a’ as the first term and ‘r’ as the common ratio then $S_n : S_{2n}$ is

• A. $ r^n +1$
• B. $\frac1{r^n +1}$
• C. $ r^n -1$
• D. $\frac1{r^n -1}$

Answer 1

The Correct Option is B

The correct answer is Option (B) : $\frac1{r^n +1}$