The coefficient of x^(n) in the expansi...

The coefficient of `x^(n)` in the expansion of `(1)/((1-x)(3 -x))`, is

A

`(3^(n+1)-1)/(2.3^(n+1))`

B

`(3^(n+1)-2)/(3^(n+1))`

C

`((3^(n+1)-1)/(3^(n+1)))`

D

None of these

Verified by Experts

The correct Answer is:

A

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