| |
| |
1. |
Solve the equation x3 - 27 = 0. |
| |
|
A. |
3,  ,  |
| |
|
B. |
3,  ,  |
| |
|
C. |
3,  ,  |
| |
|
D. |
3,  ,  |
| |
|
Hint |
|
| |
2. |
Find  . |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
1000i |
D. |
10i |
| |
|
Hint |
|
| |
3. |
Find  . |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
4. |
Find the principal fourth root of 256i. Leave the result in polar form. |
| |
|
A. |
 |
B. |
4 (cos 0 + i sin 0) |
| |
|
C. |
4 |
D. |
 |
| |
|
Hint |
|
| |
5. |
Solve the equation x4 - 81 = 0. |
| |
|
A. |
3, -3i,  ,  |
| |
|
B. |
3, -3, 3i, -3i |
| |
|
C. |
3, 3i,  , |
| |
|
D. |
3, -3,  , - |
| |
|
Hint |
|
|
|