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यदि x=1+a+a^2+….infty(|a| lt 1) y=1+b+b^...

यदि `x=1+a+a^2+….infty(|a| lt 1) y=1+b+b^2+…….infty,(|b| lt 1)` तब `1+ab+a^2b^2+……….infty`का मान होगा

A

`(xy)/(x+y-1)`

B

`(xy)/(x+y+1)`

C

`(xy)/(x-y-1)`

D

`(xy)/(x-y+1)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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