{8^{-2},\ 8^{0,5},\ 8^{0,25},\ 8^{1,5}\}
8^{-2}=(\frac{1}{8})^2=\frac{1}{64} , W
8^{0,5}=8^{\frac{1}{2}}=\sqrt8=\sqrt{4*2}=2\sqrt2 , NW
8^{\frac{1}{4}}=\sqrt[4]{8} , NW
8^{1,5}=(2^3)^{1,5}=2^{4,5}=2^4*2^{0,5}=16*2^{\frac{1}{2}}=16\sqrt{2} , NW
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