Question

In the expansion of $\frac{1}{2}n$, the coefficient of x^–10 will be.

• A. $e^{2}$
• B. $e^{2} - 1$
• C. $e - 1$
• D. $e^{2} + 1$

Answer 1

Answer: (C)

$e - 1$

Answer 2

$4\left\lbrack 1 + 4\sqrt{2} + \frac{4.3}{2}.2 + \frac{4.3.2}{1.2.3}.2\sqrt{2} + 4 \right\rbrack$

$4\lbrack 1 + 4\sqrt{2} + 12 + 8\sqrt{2} + 4\rbrack$

Then coefficient of $4\lbrack 17 + 12\sqrt{2}\rbrack$ is

$4\lbrack 17 + (\widetilde{-}17)\rbrack$.