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\(\dfrac{1}{32}\) = 2-5
\(\dfrac{1}{8}\) = 2-3
0,5 = \(\dfrac{1}{2}\) = 2-1
0,25 = \(\dfrac{1}{4}\) = 2-2
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`@` `\text {Ans}`
`\downarrow`
`-1/27 = ( (-1)^3/(-3)^3) =(-1/3)^3`
`8/729 = ( (2^3)/(9^3) ) = (2/9)^3`
`16/685 = ( (4^2)/( \sqrt {685}) ) = (4/(\sqrt {685}) )^2`
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\(\frac{32\cdot2^4}{2^2\cdot\frac{1}{16}}\)
\(=\frac{2^5\cdot2^4}{\frac{4}{16}}\)
\(=\frac{2^9}{\frac{1}{4}}\)
\(=2^9\cdot4\)
\(=2^9\cdot2^2\)
\(=2^{11}\)
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0,25 = (0,5)2
\(\dfrac{1}{49}\) = (\(\dfrac{1}{7}\))2
- \(\dfrac{27}{125}\) = (- \(\dfrac{3}{5}\))3
\(\dfrac{81}{16}\) = ( \(\dfrac{9}{4}\))2
\(\dfrac{169}{196}\) = (\(\dfrac{13}{14}\))2
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\(27\cdot5^3\cdot3^3\cdot32^{-1}:125=3^3\cdot5^3\cdot3^3\cdot\dfrac{1}{32}:5^3=\dfrac{3^6}{32}=\dfrac{3^6}{2^5}\)
1/4×1/16×1/32=\(\frac{1}{2^2}\)x \(\frac{1}{2^4}\)x \(\frac{1}{2^6}\)=\(\frac{1}{2^{12}}\)
Ta có :
\(\frac{1}{4}.\frac{1}{16}.\frac{1}{32}=\frac{1}{2^2}.\frac{1}{2^4}.\frac{1}{2^5}=\frac{1}{2^{11}}=\frac{1^{11}}{2^{11}}=\left(\frac{1}{2}\right)^{11}\)
Chúc bạn học tốt ~