The middle term in the expansion of (1+1 x^ 2 ) (1+x^ 2 )^ n is: - Vidyadip

MCQ

The middle term in the expansion of$\Big(1+\frac{1}{\text{x}^{2}}\Big)\big(1+\text{x}^{2}\big)^{\text{n}}$ is:

A
$ { }^{2 n} \mathrm{Cn}{~x}^{2 n} $
B
$ { }^{2 n} \mathrm{Cn} {~x}^{-2 n} $
✓
$ { }^{2 n} \mathrm{Cn} $
D
$ { }^{2 n} C_{n-1} $

✓

Answer

Correct option: C.

$ { }^{2 n} \mathrm{Cn} $

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