Tutorial - Finding the absolute value of a complex number ex 5, (4 + i)

What is the real part of the complex number 4 + i?

• 4

• i

• 0

• 1

In the complex number 4 + i, what is the value of B?

• 1

• i

• 0

• 4

Why can't the value of B be zero in a complex number like 4 + i?

• Because it would make the real part zero

• Because it would make the number purely imaginary

• Because it would eliminate the imaginary part

• Because it would make the number undefined

What is the formula to find the absolute value of a complex number?

• a + b

• a^2 - b^2

• a^2 + b^2

• sqrt(a^2 + b^2)

What is the absolute value of the complex number 4 + i?

• 1

• 5

• 4

• sqrt(17)