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![](https://rs.olm.vn/images/avt/0.png?1311)
a/108.28=(10.2)8=208
b/108:28=(10:2)8=58
c/254.28=(52)4.28=58.28=(5.2)8=108
d/158.94=158.(32)4=158.38=(15.3)8=458
e/272:253=(33)2:(52)3=36:56=(3:5)6=(3/5)6
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
\(10^8.2^8=\left(10.2\right)^8=20^8\)
b)
\(10^8:2^8=\left(10:2\right)^8=5^8\)
c)
\(25^4.2^8=\left(5^2\right)^4.2^8=5^8.2^8=\left(2.5\right)^8=10^8\)
d)
\(15^8.9^4=15^8.\left(3^2\right)^4=15^4.3^4=45^4\)
e)
\(27^2:25^3=\left(3^3\right)^2:\left(5^2\right)^3=3^6:5^6=\left(\frac{3}{5}\right)^6\)
![](https://rs.olm.vn/images/avt/0.png?1311)
254 . 28 = (52)4 . 28 = 52.4 . 28 = 58 . 28 = (5 . 2)8 = 108
![](https://rs.olm.vn/images/avt/0.png?1311)
Trả lời:
a, \(15^8.9^4\)
\(=15^8.\left(3^2\right)^4\)
\(=15^8.3^8\)
\(=45^8\)
b, \(27^2:25^3\)
\(=\left(3^3\right)^2:\left(5^2\right)^3\)
\(=3^6:5^6\)
\(=\left(\frac{3}{5}\right)^6\)
Hok Tốt!!!!
a. 158 . 94
= 158 . (32)4
= 158.38
= (15.3)8
= 458
b. 272 : 253
= (33)2 : (52)3
= 36 : 56
= \(\left(\frac{3}{5}\right)^6\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 272 : 253
= (33)2 : (52)3
= 36 : 56
\(=\left(\frac{3}{5}\right)^6\)
b) 254 : 28
= (52)4 : 28
= 58 : 28
\(=\left(\frac{5}{2}\right)^8\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(2^6\cdot3^3=\left(2^2\cdot3\right)^3=12^3\)
b: \(6^4\cdot8^3=2^4\cdot3^4\cdot2^9=2^{13}\cdot3^4\)
c: \(16\cdot81=36^2\)
d: \(25^4\cdot2^8=100^4\)
Viết các biểu thức sau dưới dạng lũy thừa của một số hữu tỉ:
a. 108 . 28
b. 272 : 253
Help me!!!!!!!...
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 108 . 28 = ( 2.5 )8 . 28
= 28 . 58 .28
= 216 . 58
b, 272 : 253 = ( 33 )2 : ( 52 )3
= 36 : 56
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,20^8.4^8=\left(20.4\right)^8=80^8\)
\(b,10^6:2^6=\left(10:2\right)^6=5^6\)
\(c,5^4.2^8=5^4.\left(2^2\right)^4=5^4.4^4=\left(5.4\right)^4=20^4\)
\(d,7^8.9^4=7^8.\left(3^2\right)^4=7^8.3^8=\left(7.3\right)^8=21^8\)
\(e,27^4:25^6=\left(3^3\right)^4:\left(5^2\right)^6=3^{12}:5^{12}=\left(3:5\right)^{12}=\left(\frac{3}{5}\right)^{12}\)