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Which set lists all four fourth roots of 1?
A1, 2, 3, 4
B1, i, 2i, 4i
C1, -1, 2, -2
D1, -1, i, -i
Answer & Solution
Correct answer: D. 1, -1, i, -i
Each of 1, i, -1, -i raised to the fourth power equals 1.
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