In an AP, $S_{p}=q, S_{q}=p$ and S denotes the sum of first r terms. Then, $\mathrm{S}_{\mathrm{p}+\mathrm{q}}$ is equal to
A. 0 B. – (p + q) C. p + q D. pq Answer: Option CShow Answer
Solution(By Apex Team)
In an A.P. $S_{p}=q, S_{q}=p$
$\begin{array}{l}
\mathrm{S}_{\mathrm{p}+\mathrm{q}}=\text { Sum of }(\mathrm{p}+\mathrm{q}) \text { terms }\\
=\text { Sum of } \mathrm{p} \text { term }+\text { Sum of } \mathrm{q} \text { terms }\\
=\mathrm{p}+\mathrm{q}
\end{array}$
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