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ta có :
\(\hept{\begin{cases}11^{1979}< 11^{1980}=\left(11^3\right)^{660}\\37^{1320}=\left(37^2\right)^{660}\end{cases}}\)
mà \(37^2>11^3\Rightarrow37^{1320}>11^{1979}\)
\(2018^{10}=\left(2016+2\right)^{10}\)
\(2017^9=\left(2016+1\right)^9\)
\(\Rightarrow2016^{10}+\left(2016+1\right)^9>\left(2016+2\right)^2\)
\(\Rightarrow2016^{10}+2017^9>2018^{10}\)
\(3>2\)
\(=>3^{24680}>2^{24680}\)
mà \(2^{24680}>2^{3720}\)
\(=>3^{24680}>2^{3720}\)
Ta có :
324680 > 224680
Vì 3 > 2
Mà 224680 > a3720
=> 324680 > 224680 > a3720
Vậy 324680 > 23720
\(72^{45}>72^{44}\)
\(\Rightarrow72^{45}-72^{43}>72^{44}-72^{43}\)
Vậy...
a) \(2^{4000}\) và \(4^{2000}\)
\(2^{4000}=\left(2^2\right)^{2000}\)
\(4^{2000}=\left(2.2\right)^{2000}\)
\(2^{4000}=\left(2^2\right)^{2000}=4^{2000}\)
\(\Rightarrow2^{4000}=4^{2000}\)
b) \(33^{44}\) và \(44^{33}\)
\(33^{44}=\left(11.3\right)^{44}\)
\(44^{33}=\left(11.4\right)^{33}\)
\(11^{44}.\left(3^4\right)^{11}>11^{33}.\left(4^3\right)^{11}\)
\(\Rightarrow33^{44}>44^{33}\)
Ta có : \(2^{333}=\left(2^3\right)^{111}=8^{111}\)
\(3^{222}=\left(3^2\right)^{111}=9^{111}\)
Do : \(8^{111}< 9^{111}\left(8< 9\right)\)
\(\Rightarrow2^{333}< 3^{222}\)
Bài 1:
\(\left(x-2013\right)^{2014}=1\)
\(\Leftrightarrow\orbr{\begin{cases}x-2013=1\\x-2013=-1\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2014\\x=2012\end{cases}}}\)
Vậy x=2014; x=2012
Bài 2:
a) Ta có: \(2^{333}=\left(2^3\right)^{111}=8^{111}\)
\(3^{222}=\left(3^2\right)^{111}=9^{111}\)
Ta thấy 8<9 => \(8^{111}< 9^{111}\Rightarrow2^{333}< 3^{222}\)
b) Ta có: \(9^{1005}=\left(3^2\right)^{1005}=3^{2010}\)
Ta thấy \(3^{2009}< 3^{2010}\Rightarrow3^{2009}< 9^{1005}\)
c) \(99^{20}=\left(99^2\right)^{10}=9801^{10}\)
Thấy \(9801< 9999\Rightarrow9801^{10}< 9999^{10}\Rightarrow99^2< 9999^{10}\)
B1: (x-2013)2014=1 =>x-2013=1;-1=>x=2014;2012 B2: a)có:2333=(23)111=8111 ; 3222=(32)111=9111 =>2333<3222(8111<9111) b)có:91005=(32)1005=32010 >32009 =>91005>32009 c)có:9920=(992)10=980110<999910 =>9920<999910
7245 - 7244 = 7244(72-1)=7244.71
7244 - 7243 = 7243(72-1)=7243.71
7245- 7244 > 7244 - 7243