1.

If the expansion in powers of x of the function (1)/((1-ax)(1-bx)) is a_(0)+a_(1)x+a_(2)x^(2)+a_(3)x^(3)+.....+a_(n) thencoefficient of x^(n) is

Answer»

`(a^(N+1)-B^(n+1))/(b-a)`
`(b^(n+1)-a^(n+1))/(b-a)`
`(b^(n)-a^(n))/(b-a)`
`(a^(n)-b^(n))/(b-a)`

ANSWER :B


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