Question

If
x= 1+ a+a^2 + .. infinity (|a|<1) ,
y= 1+ b+b^2 + .. infinity (|b|<1)

Then the value of 1+ ab + a²b^2 + ...... infinity is ?

(a) x y / x + y - 1
(b) x y / x + y +1
(c) x y / x - y - 1
(d) x y /x - y + 1​

Answer 1

Step-by-step explanation:

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