A Das Gupta Problems Plus in IIT Mathematics Exercise Solution of Arithmetic Progression Chapter 1.p

A Das Gupta Problems Plus in IIT Mathematics Exercise Solution of Arithmetic Progression Chapter 1.
If the nonzero numbers a1,a2,a3,....,an are in AP, prove that 1a1a2a3+1a2a3a4+...+1an−2an−1an=12(a2−a1)(1a1a2−1an−1an)
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Hey, I have given here detailed solution of A Das Gupta book problems plus in IIT mathematics Chapter no. 1 solution Progression, Related inequalities and series, Arithmetic progression topic.
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[@goutamgiri110]

Please start with Permutations & Combination chapter.

[@poojavishwakarma345]

Okk, I do