Complex Numbers Answers
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Which complex number has an absolute value of 5?
A
–3 + 4iB
2 + 3iC
7 – 2iD
9 + 4i2
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If , what is the value of i 3?
A
–1B
iC
1D
–i3
What is the square root of –16?
A
–8iB
–4iC
4iD
8i4
Which complex number is represented by the point graphed on the complex plane below?
A
–4 + 3iB
3 + 4iC
3 – 4iD
4 + 3i5
What is the square root of -1?
A
–iB
iC
–1D
16
What is the distance from the origin to point A graphed on the complex plane below?
A
StartRoot 5 EndRoot
B
StartRoot 13 EndRoot
C
9D
137
If f(x) = x3 – 2x2, which expression is equivalent to f(i)?
A
–2 + iB
–2 – iC
2 + iD
2 – i8
Which of the following is equivalent to ?
A
5iB
18 – 5iC
18 + 5iD
239
If f(x) = 1 – x, which value is equivalent to |f(i)|?
A
0B
1C
StartRoot 2 EndRoot
D
StartRoot negative 1 EndRoot
10
In which quadrant is the number –14 – 5i located on the complex plane?
A
IB
IIC
IIID
IV11
Which of the following is an example of a complex number that is not in the set of real numbers?
A
-7B
2 + StartRoot 3 EndRoot
C
4 + 9iD
Pi
12
Which expression is equivalent to ?
A
Negative 4 StartRoot 5 EndRoot
B
Negative 4 StartRoot 5 EndRoot i
C
4 StartRoot 5 EndRoot i
D
4 StartRoot 5 EndRoot
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