College Algebra / Alg 057 · Atom · ~20 seconds
Rational Exponents: the 1/n Power
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A rational exponent of 1/n means the principal nth root: a^(1/n) = ⁿ√a.
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8^(1/3) is ∛8 = 2, and 16^(1/4) is ⁴√16 = 2. The fraction upstairs is a root in disguise.
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With an even index, the base cannot be negative.
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