If ω is a cube root of unity then the value of (1 - ω + ω2)4 + (1 + ω - ω2)4 is
0
32
-16
-32
The quadratic equation whose root are ± i√18
x2 ± i√18 = 0
x2 + 2√18 = 0
x2 - 18 = 0
x2 + 18 = 0
If z is a complex number then
|z2| >|z|2
|z2| =|z|2
|z2| <|z|2
|z2| ≥|z|2
10
8
6
none of these
Solution of √5x2+ x + √5 = 0 is
(1 ± √19)/2√5
(-1 ± i√19)/2 √5
(-1 ± 5)/2√5
If x = a + b, y = aω + bω2, z = aω2 + bω and ω is a complex cube root of unity, then the value of xyz is
a + b
a3 + b3
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
The conjugate of i13 + i14 + i15 + i16 is
1
-1
-i
-1+√-3 = re iθ,then θ is equal to
2n/3
-2n/3
n/3
-n/3
The number of values of [cosθ + i sinθ]2n/2n+1
2n + 1
2n
2n + 2
2n - 1
