Question

$1 + \frac{1 + 3}{2!} + \frac{1 + 3 + 5}{3!} + \frac{1 + 3 + 5 + 7}{4!} + .......\infty =$

• A. $e/2$
• B. $e$
• C. $2e$
• D. $3e$

Answer 1

Answer: (C)

$2e$

Answer 2

$4e$

$1 - x + \frac{x^{2}}{2!} - \frac{x^{3}}{3!} + ....\infty =$

$e^{x}$.