Unit Test #40

Select your answers to the following 5 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

 

How many roots has the equation z4 = 3 + 2i?

A. 1

B. 2

C. 3

D. 4

Answer 1:

 

Q2:

 

Expand (2 cis 2)3

A. 6 cis 6

B. 8 cis 6

C. 8 cis 8

D. 6 cis 8

Answer 2:

 

Q3:

 

z = 3 + 3i.

Write z in polar form.

A. 3 cis 

B. 9 cis 

C. √18 cis 

D. 3 cis 

Answer 3:

 

Q4:

 

 If z = 3 + 3i

Find z2

A. √18 cis 

B. 18 cis 

C. √18 cis 

D. 18 cis 

Answer 4:

 

Q5:

 

If z = 2 + √5i

Find z4

A. 81 cis( 3.364)

B. 81 cis ( 0.841)

C. 12 cis ( 0.841)

D. 12 cis (3.364)

Answer 5: