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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 C
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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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