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\(\frac{32\cdot2^4}{2^2\cdot\frac{1}{16}}\)
\(=\frac{2^5\cdot2^4}{\frac{4}{16}}\)
\(=\frac{2^9}{\frac{1}{4}}\)
\(=2^9\cdot4\)
\(=2^9\cdot2^2\)
\(=2^{11}\)
\(\dfrac{1}{32}\) = 2-5
\(\dfrac{1}{8}\) = 2-3
0,5 = \(\dfrac{1}{2}\) = 2-1
0,25 = \(\dfrac{1}{4}\) = 2-2
`@` `\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`
a) \(\left(\frac{1}{16}\right)^{25}\div\left(\frac{1}{2}\right)^{30}=\left(\frac{1}{2^4}\right)^{25}\div\left(\frac{1}{2}\right)^{30}=\left[\left(\frac{1}{2}\right)^4\right]^{25}\div\left(\frac{1}{2}\right)^{30}=\left(\frac{1}{2}\right)^{4.25}\div\left(\frac{1}{2}\right)^{30}\)
\(=\left(\frac{1}{2}\right)^{100}\div\left(\frac{1}{2}\right)^{30}=\left(\frac{1}{2}\right)^{100-30}=\left(\frac{1}{2}\right)^{70}\)
b) \(584^{100}\div292^{100}=\left(584-292\right)^{100}=292^{100}\)
c) \(125^4\cdot16^3=\left(5^3\right)^4\cdot\left(2^4\right)^3=5^{3\cdot4}\cdot2^{4\cdot3}=5^{12}\cdot2^{12}=\left(5+2\right)^{12}=7^{12}\)
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 ~