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\(\left(12^8:12\right)\left(243:3^4\right)\cdot\left(10^9:1000\right)\)
\(=12^{8-1}\cdot3^{5-4}\cdot10^{9-3}\)
\(=12^7\cdot3^1\cdot10^6\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(A=\left(2^3\right)^2\cdot\left(2^5\right)^4=2^6\cdot2^{20}=2^{26}\)
b: \(=\left(3^3\right)^3\cdot\left(3^2\right)^4\cdot3^5=3^9\cdot3^8\cdot3^5=3^{22}\)
\(A=8^2.32^4=\left(2^3\right)^2.\left(2^5\right)^4=2^6.2^{20}=2^{26}\)
\(B=27^3.9^4.243=\left(3^3\right)^3.\left(3^2\right)^4.3^5=3^9.3^8.3^5=3^{22}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(A=8^2\cdot32^4=2^6\cdot2^{20}=2^{26}\)
b: \(B=27^3\cdot9^4\cdot243=3^9\cdot3^8\cdot3^5=3^{22}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(27^3.9^4.243=\left(3^3\right)^3.\left(3^2\right)^4.3^5\)
\(=3^9.3^8.3^5\)
\(=3^{22}\)
Học tốt nha!!!
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2x = 64
⇒ 2x = 26
⇒ x = 6.
7x = 710 : 75
⇒ 7x = 75
⇒ x = 5.
3x = 315 : 243
⇒ 3x = 315 : 35
⇒ 3x = 310
⇒ x = 10.
\(2^x=64=2^6\Rightarrow x=6\\ ---\\ 7^x=7^{10}:7^5=7^5\Rightarrow x=5\\ ----\\ 3^x=3^{15}:243=3^{15}:3^5=3^{10}\Rightarrow x=10\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)2437=(35)7=335 ; 910.275=330.315=345.
Vì 35 < 45 => 335<345=>2437<910.275.
b) 1511=311.511;813.1255=312.515.
Vì 311<312 và 511<515 => 311.511<312.515 => 1511 < 813.1255
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(12^{10}:3^{10}=\left(12:3\right)^{10}=4^{10}\)
b) \(4^5.3^{10}=4^5.3^{2.5}=4^5.\left(3^2\right)^5=4^5.9^5=\left(4.9\right)^5=36^5\)
c) \(9^{10}:27^4=\left(3^2\right)^{10}:\left(3^3\right)^4=3^{2.10}:3^{3.4}=3^{20}:3^{12}=3^8\)
d) \(15^8:9^4=15^8:\left(3^2\right)^4=15^8:3^8=\left(15:3\right)^8=5^8\)
243:34=35:34=31
109:10000=109:104=105
10 mũ 5