若x的n次方等于3,x的3n次方等于几?

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x的n次方等于3
x的3n次方等于(x^n)^3=3^3=27

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因为x^n=3
x^3n=(x^n)^3=3^3=27

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27

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x^3n=(x^n)³=3³=27

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