Complex Numbers and Quadratic Equations's Question 56 | Mathematics XI | NCERT Exemplar Questions - Books ExamGOAL

56

MCQ (Single Correct Answer)

The value of $\arg(x)$, when $x < 0$ is

A

0

B

$\frac{\pi}{2}$

C

$\pi$

D

None of these

57

MCQ (Single Correct Answer)

If $f(z)=\frac{7-z}{1-z^2}$, where $z=1+2 i$, then $|f(z)|$ is equal to

A

$\frac{|z|}{2}$

B

$|z|$

C

$2|z|$

D

None of these