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

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

A

`(-1)^(a-1).(n-1)^(2) `

B

`(-1)^(n)(1-n) `

C

`n-1 `

D

`(-1)^(n-1). n `

Text Solution

Verified by Experts

The correct Answer is:
B
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HIMALAYA PUBLICATION-BINOMIAL THEOREM-QUESTION BANK
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