Tính các biểu thức sau: (-1/2)^5; (-2/3)^4; (-2 1/4)^3; (0,3)^5; (-25,7)^0

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Tính: \({\left( {\frac{{ - 1}}{2}} \right)^5}\,;\,\,{\left( { - \frac{2}{3}} \right)^4}\,;\,\,{\left( { - 2\frac{1}{4}} \right)^3};\,\,{\left( {0,3} \right)^5};\,\,{\left( { - 25,7} \right)^0}\).

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Giải thích

• \({\left( {\frac{{ - 1}}{2}} \right)^5} = \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) = \frac{{ - 1}}{{32}}\);

• \({\left( { - \frac{2}{3}} \right)^4} = \left( { - \frac{2}{3}} \right) \cdot \left( { - \frac{2}{3}} \right) \cdot \left( { - \frac{2}{3}} \right) \cdot \left( { - \frac{2}{3}} \right) = \frac{{16}}{{81}}\);

• \({\left( { - 2\frac{1}{4}} \right)^3} = {\left( { - \frac{9}{4}} \right)^3} = \left( { - \frac{9}{4}} \right) \cdot \left( { - \frac{9}{4}} \right) \cdot \left( { - \frac{9}{4}} \right) = \frac{{ - 729}}{{64}}\);

• (−0,3)⁵ = (−0,3). (−0,3). (−0,3). (−0,3). (−0,3) = −0,00243;

• (−25,7)⁰ = 1.