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Let the sum of n, 2n, 3n terms of an A.P...

Let the sum of n, 2n, 3n terms of an A.P. be `S_1,S_2`and `S_3`, respectively, show that `S_3=3(S_2-S_1)`.

A

`S_(3)=S_(1)+S_(2)`

B

`S_(3)=2(S_(1)+S_(2))`

C

`S_(3)=3(S_(2)-S_(1))`

D

none of these

Text Solution

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The correct Answer is:
C
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