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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

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

Grade:10

1 Answers

neeraj agarwal
34 Points
10 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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