Luỹ thừa của 1 số hữu tỉ

N

nguyenbahiep1

b)

[laTEX]\frac{0,8^5}{0,4^6} = \frac{4^5}{5^5}.\frac{5^6}{2^6} \\ \\ 2^{10-6}.5^{6-5} = 2^4.5 = 80[/laTEX]
 
T

thieukhang61

\[c)\frac{{{2^{15}}{{.9}^4}}}{{{6^6}{{.8}^3}}} = \frac{{{2^{15}}{{.3}^8}}}{{{2^6}{{.3}^6}{{.2}^9}}} = \frac{{{2^{15}}{{.3}^8}}}{{{2^{15}}{{.3}^6}}} = {3^2} = 9\]
 
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T

transformers123

b/ $\dfrac{0,8^5}{0,4^6} = \dfrac{2^5.0,4^5}{0,4^6} = \dfrac{32}{0,4} = 80$
c/ $\dfrac{2^{15}.9^4}{6^6.8^3}=\dfrac{2^{15}.3^8}{2^{15}.3^6}=3^2=9$
 
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