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1/a1+1/a2+1/a3..........1/an are in AP-------------------------------------------------find the value of------------------------------------------------a1a2+a2a3+a3a4+...............+.an-1.an

rahul singh , 12 Years ago
Grade 10
anser 1 Answers
neeraj agarwal

Last Activity: 12 Years ago

substract all from given question make pairs of what it want and you know aN-a(N-1)=d.solve it...............

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