1.

The term independent of x in the expansion of \[{{(1+x)}^{n}}{{\left( 1+\frac{1}{x} \right)}^{n}}\] is [EAMCET 1989]

A. \[C_{0}^{2}+2C_{1}^{2}+....+(n+1)C_{n}^{2}\]
B. \[{{({{C}_{0}}+{{C}_{1}}+....+{{C}_{n}})}^{2}}\]
C. \[C_{0}^{2}+C_{1}^{2}+.....+C_{n}^{2}\]
D. None of these
Answer» D. None of these


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