Complex Numbers

Question 1

What is the distance from the origin to point A graphed on the complex plane below?

Revolt · Accepted Answer

StartRoot 13 EndRoot

Question 2

If , what is the value of i 3?

Revolt · Accepted Answer

–i

Question 3

What is the sum of and ?

Revolt · Accepted Answer

4 StartRoot 2 EndRoot i

Question 4

If f(x) = x3 – 2x2, which expression is equivalent to f(i)?

Revolt · Accepted Answer

2 – i

Question 5

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

Revolt · Accepted Answer

2

Question 6

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

Revolt · Accepted Answer

StartRoot 2 EndRoot

Question 7

Which expression is equivalent to ?

Revolt · Accepted Answer

4 StartRoot 5 EndRoot i

Question 8

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

Revolt · Accepted Answer

4 – i

Question 9

What is the square root of –16?

Revolt · Accepted Answer

4i

Question 10

Which of the following is an example of a complex number that is not in the set of real numbers?

Revolt · Accepted Answer

4 + 9i

Complex Numbers Answers