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The coefficient of x^4 in the expansion ...

The coefficient of `x^4` in the expansion of `(1-x+2x^2)^12` is

A

`.^(12)C_(3)`

B

`.^(13)C_(3)`

C

`.^(14)C_(3)`

D

`.^(12)C_(3)+3.^(13)C_(3)+.^(14)C_(4)`

Text Solution

Verified by Experts

The correct Answer is:
D
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