Some calculators don't have cube roots, so you could use X to the power of 1/root. x^(1/root). The cube root of 64 equals 4 because 4*4*4 (or 4^3) gives 64. You can reverse these powers by reciprocating the exponent: 64^(1/3) = 4
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All numbers have cube roots (not necessarily integral cube roots) so every prime has cube roots.
Yes.
4
The answer depends on "different from WHAT?" Positive cube roots, or negative square roots?
There are 3 cube roots and these are:the real root -1.2599and the complex roots 0.6300 - 1.0911i and its conjugate, 0.6300 + 1.0911i.