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

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In an A.P.,if pth term is 1/q  and qth term is 1/p,  prove that the sum of first pq terms is 1/2(pq + 1), where p ≠ q. 

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Let ‘a’ be the first term and ‘d’ bet he common difference of an A.P. then, nth term

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