JEE MATHEMATICS MCQ: COMPLEX NUMBERS

1 Easy

1 of 1

Application +4 | -1

\frac{{z - 1}}{{z + 1}}

is purely imaginary number

\left( {z \ne - 1} \right)

, then

\left| z \right|

is equal to

View answer and explanation

Correct option: A

Option A (1) is correct because if (z-1)/(z+1) is purely imaginary, then its conjugate is its negative, leading to |z| = 1.

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