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The co-efficient of x in the expansion o...

The co-efficient of `x` in the expansion of `(1-x+2x^2)^11` is

A

`.^(12)C_(3)`

B

`.^(13)C_(3)`

C

`.^(12)C_(8)+4.^(12)C_(10)+6.^(12)C_(9)`

D

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

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The correct Answer is:
A
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