Additive inverse of 1 - iis - Vidyadip

MCQ

Additive inverse of $1 - i$is

A
$0 + 0i$
B
$ - 1 - i$
✓
$ - 1 + i$
D
None of these

✓

Answer

Correct option: C.

$ - 1 + i$

c
(c) If $z = x + iy$ is the additive inverse of $1 - i$then $(x + iy) + (1 - i) = 0$

==> $x + 1 = 0$, $y - 1 = 0$

==> $x = - 1$, $y = 1$

$\therefore $ The additive inverse of $1 - i$is $z = - 1 + i$

Trick : Since $(1 - i) + ( - 1 + i) = 0$.

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