10
8
6
none of these
The equation having 4 - 3i and 4 + 3i as roots is
x2 + 8x + 25 = 0
x2 + 8x - 25 = 0
x2 - 8x + 25 = 0
x2 - 8x - 25 = 0
Given x2 + 2 = 0, then x =
2
√2
±√2 i
-2i
z z¯= 0 iff
Re(z) = 0
Im(z) = 0
z = 0
The principal value of the amplitude of (1 + i) is
π/2
π/4
π
3π/4
is equal to
i
2i
1 - i
Which of the following is not applicable for a complex number ?
Addition
Subtraction
Division
Inequality
The complex number 1 + 2i/1 - i lies in
First quadrant
Second quadrant
Third quadrant
Fourth quadrant
If z is a complex number then
|z2| >|z2|
|z2| =|z2|
|z2| = z
|z2| ≥|z2|
a + ib < c + id ; a,b,c,d ∈ R is meaningful only when
a2 + c2 = 0
b2 + c2
b2 + d2 = 0
a2 + d2 = 0
