Answers: 1
![\displaystyle \large {{a}^{ - n} = \frac{1}{ {a}^{n} } } \\ \displaystyle \large { {a}^{ \frac{m}{n} } = \sqrt[n]{ {a}^{m} } }](/tpl/images/2472/9264/4db44.png)
![\displaystyle \large{ {a}^{ - \frac{m}{n} } = \frac{1}{ \sqrt[n]{ {a}^{m} } } }](/tpl/images/2472/9264/54ac1.png)
![\displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ {27}^{2} } } }](/tpl/images/2472/9264/07adf.png)
![\displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ { ({3}^{3}) }^{2} } } }](/tpl/images/2472/9264/f7852.png)
![\displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ {3}^{6} } }}](/tpl/images/2472/9264/acde1.png)
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9^-1/2 and 27^-2/3 what is this...
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