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If a(1),a(2),a(3),".....",a(n) are in HP...

If `a_(1),a_(2),a_(3),".....",a_(n)` are in HP, than prove that `a_(1)a_(2)+a_(2)a_(3)+a_(3)a_(4)+"....."+a_(n-1)a_(n)=(n-1)a_(1)a_(n)`

A

`(n - 1) a_(1)a_(n)`

B

`na_(1) a_(n)`

C

`n (a_(1) + a_(n))`

D

none

Text Solution

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The correct Answer is:
A
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