Cách làm cho bạn:
a) $(\frac{−1}{3})^{4}=\frac{1}{81};(\frac{−2}{3})^{3}=\frac{−8}{27};(2\frac{1}{2})^{3}=(\frac{5}{2})^{3}=\frac{125}{8};$
$(−0.2)^{3}=−\frac{1}{125};(−125.9)^{0}=1; (0.3)^{4}=\frac{81}{10000}$
b) $(\frac{−1}{2})^{2}=\frac{1}{4};(\frac{−1}{2})^{3}=\frac{−1}{8};(\frac{−1}{2})^{4}=\frac{1}{16};(\frac{−1}{2})^{5}=\frac{−1}{32}$
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