Choose the correct options for the following questions.
Product of a complex number with its own conjugate is a
Difficulty: Medium
A:
Prime number
B:
Imaginary number
C:
Real number
D:
Real and imaginary number
Conjugate of $3+4i$ is
Difficulty: Easy
A:
$4-3i$
B:
$-3+4i$
C:
$3-4i$
D:
$-3-4i$
If $z=x+iy$ then |z|=
Difficulty: Hard
A:
$\sqrt{x^{2}+y^{2}}$
B:
$\sqrt{x^{2}-y^{2}}$
C:
$x^{2}+y^{2}$
D:
$x^{2}-y^{2}$
Premium content
Sign in and upgrade to continue reading.