Q.
If n is odd then the greatest coefficient occurs in the expansion of (x+y)n are
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a
nCn−12 nCn+12
b
nC2,nC1
c
n+1C2n+1C1
d
n+1C2n−1C2
answer is A.
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Detailed Solution
When n is odd, there are two middle terms having greatest binomial coefficients given by Cn-12 n,Cn+12 n
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