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If S1 ,S2 and S3 denote the sum of firs...

If `S_1 ,S_2` and `S_3` denote the sum of first `n_1,n_2` and `n_3` terms respectively of an A.P. Then `S_1/n_1 (n_2-n_3) + S_2/n_2 (n_3-n_1)+S_3/n_3 (n_1-n_2)` equals :

A

0

B

1

C

`S_1S_2S_3`

D

`n_1n_2n_3`

Text Solution

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The correct Answer is:
A
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