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Complex Number
Test Description: A2 ALE
Instructions: Answer all questions to get your test result.
1) square root (-1) is
A
- i
B
1
C
i
D
2
2) z = a + bi, Real part is
A
a + bi
B
z
C
bi
D
a
3) z = a + bi, imaginary part is
A
z
B
a
C
bi
D
b
4) 2+3i + 4 - i
A
6 - 2i
B
-6 + 2i
C
6 + 2i
D
-6 - 2i
5) i ^2
A
i
B
square
C
-i
D
-1
6) i^3
A
-i
B
-1
C
3
D
1
7) conjugate of (a + bi) is
A
-a -bi
B
a - bi
C
a + bi
D
-a + bi
8) The complex number (3 - 2i) is a root of a quadratic equation, write another root
A
3 + 2i
B
-3 + 2i
C
2i
D
-3 -2i
9) z = 3 + 4i, modulus of z is
A
length
B
0
C
5
D
4/3
10) z = 3 + 4i, arg of z in which quadrant?
A
-1
B
3
C
2
D
1
*select an answer for all questions
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