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If x=1+a+a^2+a^3....to infinity; and y=1+b+b^2+b^3+...to infinity Then prove that 1+ab+a^2b^2+...to infinity=xy/(x+y-1)

Answer»

If x=1+a+a^2+a^3....to infinity;

and y=1+b+b^2+b^3+...to infinity

Then prove that 1+ab+a^2b^2+...to infinity=xy/(x+y-1)



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