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Simplifying 813281^{-\frac{3}{2}}, 163416^{-\frac{3}{4}}, 272327^{-\frac{2}{3}}, and 62534625^{-\frac{3}{4}}

Evaluate expressions with negative rational exponents by first rewriting the expression using the definition of a negative exponent, an=1ana^{-n} = \frac{1}{a^n}, and then converting to radical form using a^{\frac{m}{n}} = \left(\sqrt[n]{a} ight)^m.

8132=172981^{-\frac{3}{2}} = \frac{1}{729}: Rewrite with a positive exponent to get 18132\frac{1}{81^{\frac{3}{2}}}. Convert to radical form: \frac{1}{\left(\sqrt{81} ight)^3}. Simplify the root to get 193\frac{1}{9^3}, which evaluates to 1729\frac{1}{729}.

1634=1816^{-\frac{3}{4}} = \frac{1}{8}: Rewrite as 11634\frac{1}{16^{\frac{3}{4}}}. Convert to radical form: \frac{1}{\left(\sqrt[4]{16} ight)^3}. Simplify the root to get 123\frac{1}{2^3}, which evaluates to 18\frac{1}{8}.

2723=1927^{-\frac{2}{3}} = \frac{1}{9}: Rewrite as 12723\frac{1}{27^{\frac{2}{3}}}. Convert to radical form: \frac{1}{\left(\sqrt[3]{27} ight)^2}. Simplify the root to get 132\frac{1}{3^2}, which evaluates to 19\frac{1}{9}.

62534=1125625^{-\frac{3}{4}} = \frac{1}{125}: Rewrite as 162534\frac{1}{625^{\frac{3}{4}}}. Convert to radical form: \frac{1}{\left(\sqrt[4]{625} ight)^3}. Simplify the root to get 153\frac{1}{5^3}, which evaluates to 1125\frac{1}{125}.

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Updated 2026-05-01

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