Question

In the expansion of $\frac{C_1}{C_0} + 2\frac{C_2}{C_1} +3\frac{C_3}{C_2}+…………… n \frac{C_{n}}{C_{n-1}}$ is equal to

• A. $\frac {n(n+1)}2$
• B. $\frac {n}2$
• C. $\frac {n+1}2$
• D. $3n(n+1)$

Answer 1

Answer: (A)

$\frac {n(n+1)}2$

Answer 2

The correct answer is Option (A) : $\frac {n(n+1)}2$