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高中数学必修 第一册(648题)


把下列根式化成分数指数幂:


\(\frac {1} {\sqrt[{3}] {x{{(\sqrt[{5}] {{x}^{2}})}^{2}}}}\)




知识点:第四章 指数函数与对数函数


参考答案:\(\frac{1}{{\sqrt[3]{{x{{(\sqrt[5]{{{x^2}}})}^2}}}}} = \frac{1}{{\sqrt[3]{{x \cdot {{({x^{\frac{2}{5}}})}^2}}}}} = \frac{1}{{\sqrt[3]{{x \cdot {x^{\frac{4}{5}}}}}}} = \frac{1}{{\sqrt[3]{{{x^{\frac{9}{5}}}}}}} = \frac{1}{{{{({x^{\frac{9}{5}}})}^{\frac{1}{3}}}}} = \frac{1}{{{x^{\frac{3}{5}}}}} = {x^{ - \frac{3}{5}}}.\)

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