JEE MATHEMATICS MCQ: COMPLEX NUMBERS

1 Easy

1 of 1

Application +4 | -1

\frac{{2{z_1}}}{{3{z_2}}}

is purely imaginary number, then

{\left| {\frac{{{z_1} - {z_2}}}{{{z_1} + {z_2}}}} \right|^4}

is equal to

View answer and explanation

Correct option: B

Option B (1) is correct because if

\frac{2z_1}{3z_2}

is purely imaginary, then by substituting

\frac{z_1}{z_2} = ki

and simplifying the expression

\left| \frac{z_1 - z_2}{z_1 + z_2} \right|^4

, we get 1.

More Questions from COMPLEX NUMBERS

Practice All Chapter MCQs →

{\left| {1 - i} \right|^x} = {2^x}

|z|=1

z \neq \pm 1

z, \frac{z}{1-z^2}

\left|z_r-r\right| \leq r, \forall r=1,2,3, \ldots, n

\left|\sum\limits_{r=1}^n z_r\right|

(z+a b)^3=a^3

a \neq 0

\alpha, \beta

\gamma

|\alpha-\beta|

{z^2} + {\left| z \right|^2} = 0,

z \in C

2x = - 1 + \sqrt 3 i

{\left( {1 - {x^2} + x} \right)^6} - {\left( {1 - x + {x^2}} \right)^6}