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27 December, 08:20

Find all the real fourth roots of 256.

4

-8 and 8

8

-4 and 4

+5
Answers (1)
  1. 27 December, 08:34
    0
    256 = 16^2. In turn, 16=4^2.

    The 4th roots are {4, 4, - 4 and - 4}.

    Check for yourself: Does 4^4 = 256? does (-4) ^4 = 256?
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