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If |alpha|,|beta| lt 1, s (1) =1- alpha ...

If `|alpha|,|beta| lt 1, s _(1) =1- alpha +alpha^(2) -alpha^(3)+…oo and s_(2)=1-beta +beta ^(2) -beta ^(3)+…oo` then
`(1-alpha beta +alpha^(2) beta ^(2) -alpha ^(3) beta ^(3) +…oo)` is equal to

A

`s_(1)s_(2)`

B

`(s_(1)s_(2))/(1+s_(1) s_(2))`

C

`(1)/(1+s_(1) s_(2))`

D

`(s_(1)s_(2))/(2 s_(1) s_(2)-s_(1)-s_(2)+1)`

Text Solution

Verified by Experts

The correct Answer is:
D
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 4
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