What does i 2 equal?

1. What does i2 equal? 1 -1 i Don’t know

2. z and w are equal when z=3+4i and w=6+8i True False Don’t know

3. If z=a+ib then what is b known as? Real part of z Constant part of z Imaginary part of z None of these

4. If z=4+7i, find Re(z), Im(z) and |z|. 1 2 3 4 5 1. 2. 3. 4. 5. Don’t know

5. If z=-3+4i and w=2-6i, find 2z+w. -4+14i 8+14i -4+2i 8+2i

6. If z=-3+4i and w=2-6i, find zw. -30+26i -6-24i 18+26i None of these

7. If z=6+2i and w=-2+4i, find . 1 2 3 4 3. 2. 1. 4. None of the above

8. If z=-3+4i and w=2-6i, find |z-w|. 1 2 3 4 4. 3. 2. 1.

9. If z=-3+2i, find . 13 5 13-12i 5+12i

10. Find the roots of the equation . 1 2 3 4 3. 4. 1. 2.

11. Which of the following graphs represents z=3-2i? 1 2 3 4 3. 2. 4. 1.

12. If z=a+ib in Cartesian form, what does z equal in polar form? 1 2 3 4 1. 2. 3. 4.

13. Find the polar coordinate form of z=4+2i. 1 2 3 4 1. 2. 3. 4.

14. Which of the following are true ifand 1 2 3 4 1. 2. 3. Both of the above 4. Neither of the above

15. Find a complex number expression in Cartesian form for . -2i 2+i -i 2i

16. Which of the following are correct? 1 2 3 4 1. 2. 3. 4.

17. Which of the following is known as De Moivre’s theorem if p is a rational number? 1 2 3 4 1. 2. 3. 4.

18. Find all the values of 271/3. 1 2 3 4 1. 2. 3. 4.