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[tex] = (27)^{ - \frac{2}{3} } \\ = ( {3}^{3} )^{ - \frac{2}{3} } \\ = {3}^{ - 2} \\ = \frac{1}{ {3}^{2} } \\ = \frac{1}{9} [/tex]


Semoga membantu... ✔

[tex]27 {}^{ - \frac{2}{3} } = \frac{1}{27 {}^{ \frac{ 2}{3} } } = \frac{1}{ \sqrt[3]{27 {}^{2} } } = \frac{1}{ \sqrt[3]{3 {}^{6} } } = \frac{1}{3 {}^{2} } = \frac{1}{9} [/tex]