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\(\text{Ta có}:\left|-\frac{2016}{2017}\right|>0\)
\(\left(\frac{2017}{-2016}\right)^{2001}< 0\left(\text{số mũ lẻ}\right)\)
\(\text{Do đó }\)\(\left|-\frac{2016}{2017}\right|>\left(\frac{2017}{-2016}\right)^{2001}\)
\(\text{Vậy}\)\(\left|-\frac{2016}{2017}\right|>\left(\frac{2017}{-2016}\right)^{2001}\)
Ta có : \(|\frac{-2016}{2017}|>0>\left(\frac{2017}{-2016}\right)^{2001}\)
\(\Rightarrow|\frac{-2016}{2017}|>\left(\frac{2017}{-2016}\right)^{2001}\)
Ta có:
\(\left(2015^{2015}+2016^{2015}\right)^{2016}=\left(2015^{2015}+2016^{2015}\right)^{2015}.\left(2015^{2015}+2016^{2015}\right)\)
\(>\left(2015^{2015}+2016^{2015}\right)^{2015}.2016^{2015}=\left[\left(2015^{2015}+2016^{2015}\right)2016\right]^{2015}\)
\(>\left(2015^{2015}.2015+2016^{2015}.2016\right)^{2015}=\left(2015^{2016}+2016^{2016}\right)^{2015}\)
Vậy \(\left(2015^{2015}+2016^{2015}\right)^{2016}>\left(2015^{2016}+2016^{2016}\right)^{2015}\)
1. Ta sẽ chứng minh \(2015^{2016}>2016^{2015}\)
\(\Leftrightarrow2016^{2015}-2015^{2016}< 0\Leftrightarrow2016^{2016}-2016.2015^{2016}< 0\)
\(\Leftrightarrow2016.2016^{2016}-2015.2016^{2016}-2016.2015^{2016}< 0\)
\(\Leftrightarrow2016\left(2016^{2016}-2015^{2016}\right)< 2015.2016^{2016}\)
\(\Leftrightarrow2016\left(2016^{2015}+2016^{2014}.2015+...+2015^{2015}\right)< 2015.2016^{2016}\)
\(\Leftrightarrow2016^{2015}.2015+...+2016.2015^{2015}< 2014.2016^{2016}\)
\(\Leftrightarrow2016^{2014}.2015+2016^{2013}.2015^2+...+2015^{2015}< 2014.2016^{2015}\)
\(\Leftrightarrow2015^{2015}< \left(2016^{2015}-2015.2016^{2014}\right)+\left(2016^{2015}-2015^2.2016^{2013}\right)\)
\(+...+\left(2016^{2015}-2015^{2014}.2016\right)\)
\(\Leftrightarrow2015^{2015}< 2014.2016^{2014}+2013.2016^{2014}.2015+...+2016.2015^{2013}\)
Lại có \(2015^{2015}=2014.2015^{2014}+2015^{2014}< 2014.2016^{2014}+2015^{2014}\)
Mà \(2015^{2014}< 2013.2016^{2014}.2015\)
nên \(2015^{2014}< 2014.2016^{2014}+2013.2016^{2014}.2015+...+2016.2015^{2013}\)
Vậy \(2015^{2016}>2016^{2015}.\)
Đặt A = 1 + 2 + 22 + ... + 22016
2A = 2 + 22 + 23 + ... + 22017
2A - A = (2 + 22 + 23 + ... + 22017) - (1 + 2 + 22 + ... + 22016)
A = 22017 - 1
Vì 22017 - 1 < 22017 nên A < 22017
Ủng hộ mk nha !!! ^_^
a/ \(3^{150}=\left(3^2\right)^{75}=9^{75}\)
\(2^{225}=\left(2^3\right)^{75}=8^{75}\)
\(9^{75}>8^{75}\Rightarrow3^{150}>2^{225}\)
b/
\(20162016^{10}=\left(2016.10001\right)^{10}=2016^{10}10001^{10}\)
\(2016^{20}=2016^{10}.2016^{10}\)
\(10001^{10}>2016^{10}\Rightarrow2016^{10}.10001^{10}>2016^{10}.2016^{10}\Rightarrow20162016^{10}>2016^{20}\)
c/ \(\frac{222^{333}}{333^{222}}=\frac{\left(222^3\right)^{111}}{\left(333^2\right)^{111}}=\frac{\left(2^3.111^3\right)^{111}}{\left(3^2.111^2\right)^{111}}=\left(\frac{8.111}{9}\right)^{111}\)
\(\frac{888}{9}>1\Rightarrow\left(\frac{888}{9}\right)^{111}>1\Rightarrow222^{333}>333^{222}\)
a) Ta có: 3^150 = 3^2.75 = (3^2)^75 = 9^75
2^225 = 2^3.75 = (2^3)^75 = 8^75
Vì 9 > 8 nên 9^75 > 8^75
Vậy 3^150 > 2^225
b) Ta có: 2016^20 = 2016^10+10 = 2016^10 . 2016^10
20162016^10 = (10001 . 2016)^10 = 10001^10 . 2016^10
Vì 2016^10 < 10001^10 nên 2016^10 . 2016^10 < 10001^10 . 2016^10
Vậy 2016^20 < 20162016^10
Ta có :
20169 + 201610 = 20169 x (1 + 2016) = 20169 x 2017 (1)
201710 = 20179 x 2017 (2)
Từ (1) và (2) = > 20169 + 201610 < 201710
Ủng hộ mk nha !!! ^_^
van anh ta oi ,chỗ 20169.2017=20169+201610 là sao