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\(3^{203}\) và \(2^{302}\)
Ta có:
\(3^{203}>3^{202}=\left(3^2\right)^{101}=9^{101}.\)
\(2^{302}< 2^{303}=\left(2^3\right)^{101}=8^{101}.\)
Vì \(9>8\) nên \(9^{101}>8^{101}.\)
\(\Rightarrow3^{203}>2^{302}.\)
Chúc bạn học tốt!
![](https://rs.olm.vn/images/avt/0.png?1311)
3203=3200.33=(32)100.27=9100.27
2302=2300.22=(23)100.4=8100.4
Vì 9100>8100
Và 27>4
=> 9100.27>8100.4
=>3203>2302
Chúc bạn học giỏi nha!!!
K cho mik vs nhé Phương Quyên
![](https://rs.olm.vn/images/avt/0.png?1311)
ta có: 2333 = (23)111 = 8111
3222 =(32)111 = 9111
=> ....
TC \(2^{333}=\)\(2^{3.111}\)\(\left(2^3\right)^{111}=8^{111}\)
LC \(3^{222}=3^{2.111}=\left(3^2\right)^{111}=9^{111}\)
MÀ 8<9
\(\Rightarrow8^{111}< 9^{111}\)
\(hay\)\(2^{333}< 3^{222}\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) Ta co :
\(2^{30}=\left(2^3\right)^{10}=8^{10}\)
\(3^{20}=\left(3^2\right)^{10}=9^{10}\)
Vì \(8^{10}< 9^{10}\)
\(\Rightarrow2^{30}< 3^{20}\)
b)
Ta có :
\(7^6+7^5-7^4\)
\(=7^4\left(7^2+7-1\right)\)
\(=7^4.55\)
=> đpcm
a)Ta có:
230 = (23)10 = 810
320 = ( 32 )10 = 910
Vì 810 < 910 => 230 < 320
b) 76 + 75 - 74
= 74 (72 + 7 - 1 )
= 74 *55 chia hết 55
Đpcm
![](https://rs.olm.vn/images/avt/0.png?1311)
Có
\(\left|x-2\right|+\left|x-4\right|=\left|x-2\right|+\left|4-x\right|\ge\left|x-2+4-x\right|=2\)
\(\left|x-3\right|\ge0\)
=> \(\left|x-2\right|+\left|x-4\right|+\left|x-3\right|\ge2\)
Dấu "=" xảy ra
\(\Leftrightarrow\left\{{}\begin{matrix}x=3\\x-2>0\\4-x>0\end{matrix}\right.\) hoặc \(\left\{{}\begin{matrix}x=3\\x-2< 0\\4-x< 0\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}\left\{{}\begin{matrix}x=3\\x>2\\x< 4\end{matrix}\right.\\\left\{{}\begin{matrix}x=3\\x< 2\\x>4\end{matrix}\right.\end{matrix}\right.\)
\(\Leftrightarrow x=3\)
\(3^{203}=3^{200}.3^3=9^{100}.27\)
\(2^{302}=2^{300}.2^2=8^{100}.4\)
Vì \(9^{100}>8^{100}\); \(27>4\)\(\Rightarrow3^{203}>2^{302}\)
\(3^{203}>3^{202}=\left(3^2\right)^{101}=9^{101}\)
\(2^{302}< 2^{303}=\left(2^3\right)^{101}=8^{101}\)
\(\Rightarrow2^{302}< 8^{101}< 9^{101}< 3^{203}\)