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The greatest coefficient in the expansio...

The greatest coefficient in the expansion of `(1+ x)^(2n +1)` is

A

`((2n+1)!)/(n!(n+1)!)`

B

`((2n+2)!)/(n!(n+1)!)`

C

`(2n!)/((n!)^(2))`

D

None of these

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The correct Answer is:
a
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