Question

Additive inverse of $-1-i$ is

• A. 0 + 0i
• B. 1 - i
• C. 1 + i
• D. none of these

Answer 1

The correct option is C 1 + i

Let $a,b$ be two complex numbers.
$b$ is called additive inverse of $a$ iff $a+b=0$
$a=-1-i$
$\Rightarrow b=-a=1+i$
Hence, option C.