Real and Imaginary Parts

What is a complex number?

• a number that can be expressed in the form ai + bi

• a number that can be expressed in the form a + bi

• a number that can be expressed in the form abi

• a number that can be expressed in the form ai - bi

What is the imaginary part of 21-14i?

• 14

• 21

• -21

• -14

What is the real part of 17i?

• 17

• i

• 1

• 0

What is the imaginary part of 14+21i?

• 14

• 21

• -21

• -14

What is the real part of 13.2i+1?

• 13.2

• -1

• 1

• -13.2

What is the imaginary part of 17i?

• 17

• i

• 1

• 17i

What is the imaginary part of 13.2i+1?

• 13.2

• -1

• 1

• -13.2

What is the real part of 1 - i?

• -1

• i

• 1

• 0

What is the imaginary part of 1 - i?

• -1

• i

• 1

• -i

What is the real part of 23?

• 23

• i

• 1

• 0