Question

In the expansion of$(e^{x} - 1)^{2}$, the coefficient of $x^{4}$ will be.

• A. 1/12
• B. 7/12
• C. 5/12
• D. None of these

Answer 1

Answer: (B)

7/12

Answer 2

$\frac{1 - 2x + 3x^{2}}{e^{x}}$

$x^{5}$

$\frac{71}{120}$The coefficient of

$x ^ { 4 }$ $\frac{31}{40}$.