Question

# Find the additive inverse of $1 - i$.

Hint: In the given question, we have been given a number $1 - i$ and we have to find its additive inverse. For finding that, we do not need to do any complicated stuff about the properties of the number given or any such thing, we just need to know what an additive inverse is.
The additive inverse of a number or expression is that number or expression which when added to that original quantity gives zero. Hence, the additive inverse of a number or expression $k$ is given by,
Additive inverse $= - \left( k \right) = - k$
Thus, the additive inverse of $1 - i$ is $- \left( {1 - i} \right) = - 1 + i$.