1.

x=1+a+a2+...∞(a<1) y=1+b+b2+...∞(b<1) Then the value of 1+ab+a2b2+.....∞ is [MNR 1980; MP PET 1985]

Answer»

x=1+a+a2+...(a<1)
y=1+b+b2+...(b<1)
Then the value of 1+ab+a2b2+..... is
[MNR 1980; MP PET 1985]




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