Question

The conjugate of a complex number is $\frac{1}{i-1}$. Then that complex number is

• A. $\frac{-1}{i-1}$
• B. $\frac{1}{i+1}$
• C. $-\frac{1}{i+1}$
• D. $\frac{1}{i-1}$

Answer 1

Answer: (C)

Conjugate of the complex number $=\frac{1}{i-1}$
$\therefore$ complex number $=\frac{1}{-i-1}=-\frac{1}{i+1}$