A series whose $n^{th}$ term is $\left( {\frac{n}{x}} \right) + y,$ the sum of $r$ terms will be
A series whose $n^{th}$ term is $\left( {\frac{n}{x}} \right) + y,$ the sum of $r$ terms will be
- A
$\left\{ {\frac{{r(r + 1)}}{{2x}}} \right\} + ry$
- B
$\left\{ {\frac{{r(r - 1)}}{{2x}}} \right\}$
- C
$\left\{ {\frac{{r(r - 1)}}{{2x}}} \right\} - ry$
- D
$\left\{ {\frac{{r(r + 1)}}{{2y}}} \right\} - rx$
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