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किसी समान्तर श्रेढ़ी का p वां पद (1 )/(q...

किसी समान्तर श्रेढ़ी का p वां पद `(1 )/(q )` तथा q वां पद `(1 )/(p )`, हो तो सिद्ध कीजिए की प्रथम pq पदों का योग `(1 )/(2 ) (pq +1 )` होगा जहाँ `p ne q `

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