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Question

The middle term of the binomial expansion of (a+b)n is the 6th term.Find the possible values of n,if n is even


A

8

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B

9

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C

10

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D

11

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Solution

The correct option is C

10


There can be two cases; n is even and n is odd

If n is even, then there will be only one middle term, which is (n+22)th term.

n+22=6

n + 2 = 12

n = 10


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