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1. |
Find  . Express the result in rectangular form. |
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A. |
1024i |
B. |
-1024i |
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C. |
1024 |
D. |
-1024 |
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Hint |
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2. |
Find  . |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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3. |
Find the principal fourth root of 256i. Leave the result in polar form. |
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A. |
4 (cos 0 + i sin 0) |
B. |
4 |
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C. |
 |
D. |
 |
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Hint |
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4. |
Solve the equation x4 - 81 = 0. |
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A. |
3, -3i,  ,  |
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B. |
3, 3i,  , |
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C. |
3, -3, 3i, -3i |
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D. |
3, -3,  , - |
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Hint |
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5. |
Which of the following is not a cube root of -3 + 3i? |
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A. |
1.14 +1.14i |
B. |
-1.56 + 0.42i |
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C. |
0.42 - 1.56i |
D. |
-1.14 - 1.14i |
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Hint |
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