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Question: A series whose *n*<sup>th</sup> term is \(\left( \frac { n } { x } \right) + y\) , the sum of *r* t...

A series whose nth term is (nx)+y\left( \frac { n } { x } \right) + y , the sum of r terms will be

A

{r(r+1)2x}+ry\left\{ \frac { r ( r + 1 ) } { 2 x } \right\} + r y

B

{r(r−1)2x}\left\{ \frac { r ( r - 1 ) } { 2 x } \right\}

C

{r(r−1)2x}−ry\left\{ \frac { r ( r - 1 ) } { 2 x } \right\} - r y

D

{r(r+1)2x}−rx\left\{ \frac { r ( r + 1 ) } { 2 x } \right\} - r x

Answer

{r(r+1)2x}+ry\left\{ \frac { r ( r + 1 ) } { 2 x } \right\} + r y

Explanation

Solution