化简 (1/3)^{-4}

解答

化简

(\frac{1}{3})^{- 4}

81

求解步骤

(\frac{1}{3})^{- 4}

使用指数法则:

a^{- b} = \frac{1}{a ^{b}}

(\frac{1}{3})^{- 4} = \frac{1}{( \frac{1}{3} ) ^{4}}

= \frac{1}{( \frac{1}{3} ) ^{4}}

(\frac{1}{3})^{4} = \frac{1}{81}

= \frac{1}{\frac{1}{81}}

\frac{1}{\frac{1}{81}} = 81

= 81

- 5 - \frac{x + 4}{5} > 11 - 3 x

4 x^{2} + 8 x = 5

x - 13 < - 11

x^{3} \geq x

\frac{y}{3} + \frac{y}{5} = 8