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In an A,P if the pth term is (1)/(q) and...

In an A,P if the pth term is `(1)/(q) and q^(th)` terms is `(1)/(p)`. Prove that the sum of first pq term is `(1)/(2)` (pq+1) where, `(p!=q)`

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The correct Answer is:
`a + (p - 1)d = (1)/(q)`
`a + (q - 1)d = (1)/(p)`
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