1.

For |x| lt 1, the coefficient of x^r in the expansion of ((1+x)^2)/((1-x)^3) is

Answer»

`2R^2 + 2r + 1`
`2r^2 + 2r -1`
`2r^2 - 2r + 1`
`r^2 + 2r - 3`

ANSWER :A


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