If the sum to infinty of the series , 1+...

If the sum to infinty of the series , `1+4x+7x^(2)+10x^(3)+….`, is `(35)/(16)`, where `|x| lt 1`, then `'x'` equals to

A

`(19)/(7)`

B

`(1)/(5)`

C

`(1)/(4)`

D

`(4)/(7)`

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The correct Answer is:

B

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