JEE MATHEMATICS MCQ: COMPLEX NUMBERS

1 Easy

1 of 1

Application +4 | -1

x+i y=\sqrt{\frac{a+i b}{c+i d}}

, then

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

equals

View answer and explanation

Correct option: A

a^2+b^2

Option A (

a^2+b^2

) is correct because it follows from taking the modulus of both sides of the equation and simplifying.

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