Understanding Complex Numbers

What is the imaginary unit 'i' defined as?

• The square root of 2

• The square root of 0

• The square root of -1

• The square root of 1

How would you simplify the square root of -4 using imaginary numbers?

• 2

• 4i

• 2i

• -2i

What is the value of i^2?

• i

• -1

• 1

• -i

Which of the following is the correct value for i^3?

• 1

• i

• -1

• -i

If you need to find i^47, which power of 'i' should you consider?

• i^3

• i^1

• i^2

• i^4