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`(1 1/4)^10 . (2/5)^20`
`=(5/4)^10 . (2/5)^20`
`=(5^10 .2^20)/(4^10 .5^20)`
`=(5^10 .4^10)/(4^10 .5^20)`
`=1/(5^10)`
`=(1/5)^10`
a) 8 = 23
425 = 25.35.75
16 = 24
b) (0,09)3 = (3/10)6
(3/10)8 = (3/10)8
0,027 = (3/10)3
`@` `\text {Ans}`
`\downarrow`
`a)`
`8 = 2^3`
`32^5` chứ ạ?
`32^5 = (2^5)^5 = 2^10`
`16 = 2^4`
`b)`
`(0,09)^3 = (0,3^2)^3 = 0,3^6` hay `(3/10)^6`
`(3/10)^8 = (3/10)^8`
`(0,027) = (0,3)^3` hay `(3/10)^3`
`@` `\text {Kaizuu lv uuu}`
\(25^6\cdot8^4\)
\(=\left(5^2\right)^6\cdot\left(2^3\right)^4\)
\(=5^{2\cdot6}\cdot2^{3\cdot4}\)
\(=5^{12}\cdot2^{12}\)
\(=\left(5\cdot2\right)^{12}\)
\(=10^{12}\)
\(25^6.8^4\)
\(=\left(5^2\right)^6.\left(2^3\right)^4\)
\(=5^{2.6}.2^{3.4}\)
\(=5^{12}.2^{12}\)
\(=\left(5.2\right)^{12}\)
\(=10^{12}\)
c) \(\left(\dfrac{5}{4}\right)^4:\left(\dfrac{15}{2}\right)^4=\left(\dfrac{5}{4}:\dfrac{15}{2}\right)^4=\left(\dfrac{1}{6}\right)^4\)
d) \(10^4:16=10^4:2^4=\left(10:2\right)^4=5^4\)
e) \(\left(-2\right)^3.125=\left(-2\right)^3.5^3=\left(-2.5\right)^3=-10^3\)
f) \(64^3:\left(-2\right)^9=64^3:\left(-8\right)^3=\left(64:-8\right)^3=-8^3\)
\(A=\frac{16^{10}}{8^{12}}=\frac{\left(2^4\right)^{10}}{\left(2^3\right)^{12}}=\frac{2^{40}}{2^{36}}=2^4\)
A = 1610 / 812
=> A = ( 24)10 / ( 23)12
=> A = 240 / 236
=> A = 24
\(\left(-\frac{3}{4}\right)^{10}:\left(-\frac{1}{2}\right)^{10}\)
\(=\left(\frac{-3}{4}:\frac{-1}{2}\right)^{10}\)
\(=\left(\frac{3}{2}\right)^{10}\)
\(\left(-\frac{3}{4}\right)^{10}:\left(-\frac{1}{2}\right)^{10}=\left[\left(-\frac{3}{4}\right):\left(-\frac{1}{2}\right)\right]^{10}=\left(\frac{3}{2}\right)^{10}\)