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

The coefficient of `x^(n)` in the expansion of `((1+x)^(2))/((1 - x)^(3))`, is

A

`2r^2 + 2r + 1`

B

`2r^2 + 2r -1`

C

`2r^2 - 2r + 1`

D

`r^2 + 2r - 3`

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The correct Answer is:

A

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