Answers26.27 TCEC ALGEBRA 2.1Complex Numbers

Complex Numbers Answers

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What is the square root of –16?

A
–8i
B
–4i
C
4i
D
8i
2
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Which of the following is an example of a complex number that is not in the set of real numbers?

A
-7
B
2 + StartRoot 3 EndRoot
Option B
C
4 + 9i
D
Pi
Option D
3

Which of the following is equivalent to ?

Question illustration
A
5i
B
18 – 5i
C
18 + 5i
D
23
4

Which expression is equivalent to i 233?

A
1
B
–1
C
i
D
–i
5

What is the sum of and ?

Question illustration
A
4 StartRoot 2 EndRoot
Option A
B
4 StartRoot 2 EndRoot i
Option B
C
5 StartRoot 2 EndRoot
Option C
D
5 StartRoot 2 EndRoot i
Option D
6

Which complex number has a distance of from the origin on the complex plane?

Question illustration
A
2 + 15i
B
17 + i
C
20 – 3i
D
4 – i
7

If , what is the value of i 3?

Question illustration
A
–1
B
i
C
1
D
–i
8

If the complex number x = 3 + bi and |x|2 = 13, which is a possible value of b?

A
2
B
4
C
9
D
10
9

If f(x) = 1 – x, which value is equivalent to |f(i)|?

A
0
B
1
C
StartRoot 2 EndRoot
Option C
D
StartRoot negative 1 EndRoot
Option D
10

What is the square root of -1?

A
–i
B
i
C
–1
D
1

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