If $ x+i y=\sqrt{\frac{3+i}{1+3 i}} $ then $\left(x^2+y^2\right)^2$ equals

JEE MATHEMATICS MCQ: COMPLEX NUMBERS

1 Easy

1 of 1

Application +4 | -1

x+i y=\sqrt{\frac{3+i}{1+3 i}}

then

\left(x^2+y^2\right)^2

equals

View answer and explanation

Correct option: D

Option D (1) is correct because by simplifying the expression inside the square root and then calculating

(x^2+y^2)^2

, it can be shown that the result is 1.

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}