Q 2488734607.     If `a, x` are real numbers and `| a | < 1, | x | < 1`,
then `1 + (1 +a) x + (1 +a + a^2)x^2 + ... oo` is
equal to

WBJEE 2016
A

`1/((1-a)(1-ax))`

B

`1/((1-a)(1-x))`

C

`1/((1-x)(1-ax))`

D

`1/((1+ax)(1-a))`

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