4-1.Complex numbers
easy

The imaginary part of $\frac{{{{(1 + i)}^2}}}{{(2 - i)}}$is

A

$\frac{1}{5}$

B

$\frac{3}{5}$

C

$\frac{4}{5}$

D

None of these

Solution

(c) We have $\frac{{{{(1 + i)}^2}}}{{2 – i}} = \frac{{(2i)(2 + i)}}{{(2 – i)(2 + i)}}$$ = – \frac{2}{5} + i\frac{4}{5}$.
Thus $Im\ (z) = \frac{4}{5}$.

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.