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Question

The middle term in the expansion of (1+x)2n is


A

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B

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C

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D

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Solution

The correct option is D


Middle term of (1+2x)2n is Tn+1 = 2nCnxn

= (2n)!n!n!xn = 1.3.5.......(2n1)n! 2nxn.


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