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Chapter 4 Post Test



 1. 

Find real numbers a and b such that the equation is true.

mc001-1.jpg
a.
mc001-2.jpg
b.
mc001-3.jpg
c.
mc001-4.jpg
d.
mc001-5.jpg
e.
mc001-6.jpg
 

 2. 

Perform the addition or subtraction and write the result in standard form.

mc002-1.jpg
a.
mc002-2.jpg
b.
4
c.
6
d.
5
e.
mc002-3.jpg
 

 3. 

Write the quotient in standard form.

mc003-1.jpg
a.
mc003-2.jpg
b.
mc003-3.jpg
c.
mc003-4.jpg
d.
mc003-5.jpg
e.
mc003-6.jpg
 

 4. 

Simplify the complex number and write it in standard form.

mc004-1.jpg
a.
mc004-2.jpg
b.
mc004-3.jpg
c.
mc004-4.jpg
d.
mc004-5.jpg
e.
mc004-6.jpg
 

 5. 

Determine the number of solutions of the equation in the complex number system.

mc005-1.jpg
a.
mc005-2.jpg has degree 6 so there are three solutions in the complex number system.
b.
mc005-3.jpg has degree 3 so there are three solutions in the complex number system.
c.
mc005-4.jpg has degree 7 so there are no solutions in the complex number system.
d.
mc005-5.jpg has degree 6 so there are no solutions in the complex number system.
e.
mc005-6.jpg has degree 7 so there are three solutions in the complex number system.
 

 6. 

Find all the zeros of the function and write the polynomial as a product of linear factors.

mc006-1.jpg
a.
mc006-2.jpg
b.
mc006-3.jpg
c.
mc006-4.jpg
d.
mc006-5.jpg
e.
mc006-6.jpg
 

 7. 

Use the given zero to find all the zeros of the function.

mc007-1.jpg       
a.
mc007-2.jpg
b.
mc007-3.jpg
c.
mc007-4.jpg
d.
mc007-5.jpg
e.
mc007-6.jpg
 

 8. 

Solve the equation and write complex solutions in standard form.
mc008-1.jpg
a.
mc008-2.jpg
b.
mc008-3.jpg
c.
mc008-4.jpg
d.
mc008-5.jpg
e.
mc008-6.jpg
 

 9. 

Given that mc009-1.jpg is a zero of mc009-2.jpg, find all the zeros of f.
a.
mc009-3.jpg
b.
mc009-4.jpg
c.
mc009-5.jpg
d.
mc009-6.jpg
e.
mc009-7.jpg
 

 10. 

Plot the complex number and find its absolute value.

mc010-1.jpg
a.

mc010-2.jpg
mc010-3.jpg mc010-4.jpg
d.

mc010-11.jpg
mc010-12.jpg mc010-13.jpg
b.

mc010-5.jpg
mc010-6.jpg mc010-7.jpg
e.

mc010-14.jpg
mc010-15.jpg mc010-16.jpg
c.

mc010-8.jpg
mc010-9.jpg mc010-10.jpg
 

 11. 

Perform the operation and leave the result in trigonometric form.

mc011-1.jpg
a.
mc011-2.jpg
b.
mc011-3.jpg
c.
mc011-4.jpg
d.
mc011-5.jpg
e.
mc011-6.jpg
 

 12. 

Find the trigonometric form of mc012-1.jpg.
a.
mc012-2.jpg
b.
mc012-3.jpg
c.
mc012-4.jpg
d.
mc012-5.jpg
e.
mc012-6.jpg
 

 13. 

Multiply the complex numbers. Write the answer in trigonometric form.
mc013-1.jpg
a.
8 cos mc013-2.jpg
b.
8 cos mc013-3.jpg
c.
8 cos mc013-4.jpg
d.
6 cos mc013-5.jpg
e.
6 cos mc013-6.jpg
 

 14. 

Multiply the complex numbers. Write the answer in trigonometric form.
mc014-1.jpg
a.
7 cos mc014-2.jpg
b.
10 cos mc014-3.jpg
c.
7 cos mc014-4.jpg
d.
10 cos mc014-5.jpg
e.
10 cos mc014-6.jpg
 

 15. 

Use DeMoivre’s Theorem to find the indicated power of the complex number. Write the result in standard form.

mc015-1.jpg
a.
mc015-2.jpg
b.
mc015-3.jpg
c.
mc015-4.jpg
d.
mc015-5.jpg
e.
mc015-6.jpg
 

 16. 

Use DeMoivre’s Theorem to find the indicated power of the complex number. Write the result in standard form.

mc016-1.jpg
a.
mc016-2.jpg
b.
mc016-3.jpg
c.
mc016-4.jpg
d.
mc016-5.jpg
e.
mc016-6.jpg
 

 17. 

Use DeMoivre’s theorem to find all the solutions of the equation and represent the solutions graphically. (Round your answer to four decimal places.)

mc017-1.jpg
a.
mc017-2.jpg
b.
mc017-3.jpg
c.
mc017-4.jpg
d.
mc017-5.jpg
e.
mc017-6.jpg
 

 18. 

Use DeMoivre’s theorem to find all the solutions of the equation and represent the solutions graphically. (Round your answer to four decimal places.)

mc018-1.jpg
a.
mc018-2.jpg
b.
mc018-3.jpg
c.
mc018-4.jpg
d.
mc018-5.jpg
e.
mc018-6.jpg
 

 19. 

Write the following roots in standard form. (Round your answer to four decimal places.)

Cube roots of mc019-1.jpg
a.
mc019-2.jpg
b.
mc019-3.jpg
c.
mc019-4.jpg
d.
mc019-5.jpg
e.
mc019-6.jpg
 

 20. 

Use DeMoivre's Theorem to find the indicated power of the complex number. Write the result in standard form.
mc020-1.jpg
a.
mc020-2.jpg
b.
mc020-3.jpg
c.
125
d.
mc020-4.jpg
e.
–125
 



 
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