Complex Numbers

Question 1

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

Revolt · Accepted Answer

2 – i

Question 2

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

Revolt · Accepted Answer

StartRoot 2 EndRoot

Question 3

If , what is the value of i 3?

Revolt · Accepted Answer

–i

Question 4

What is the square root of -1?

Revolt · Accepted Answer

i

Question 5

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

Question 6

In which quadrant is the number –14 – 5i located on the complex plane?

Revolt · Accepted Answer

III

Question 7

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

Revolt · Accepted Answer

2

Question 8

What is the sum of and ?

Revolt · Accepted Answer

4 StartRoot 2 EndRoot i

Question 9

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

Question 10

What is the square root of -1?

Complex Numbers Answers