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a ) TA có :
A = 1030 = 100010
B = 2100 = ( 210 )10 = 102410
MÀ 100010 < 102410 Do đó A < B
b, Ta có :
A = 3444 = ( 34 )111 = 81111
B = 4333 = ( 43 )111 = 64111
MÀ 81111 > 64111 Do đó A > B
a)\(333^{444}=3^{444}.111^{444}=\left(3^4\right)^{111}.111^{444}=81^{111}.111^{444}\)
\(444^{333}=4^{333}.111^{333}=\left(4^3\right)^{111}.111^{333}=64^{111}.111^{333}\)
Từ \(\hept{\begin{cases}81^{111}>64^{111}\\111^{444}>111^{333}\end{cases}}\Rightarrow81^{111}.111^{444}>64^{111}.111^{333}\Rightarrow333^{444}>444^{333}\)
b)\(5^{300}=\left(5^2\right)^{150}=25^{150};4^{453}=\left(4^3\right)^{151}=64^{151}\)
Vì 25150<64151 => 5300<4453
c)\(5^{217}>5^{216}=\left(5^3\right)^{72}=125^{72}>119^{72}\) => \(5^{217}>119^{72}\)
a) Ta có: \(72^{45}-72^{44}=72^{44}\left(72-1\right)=72^{44}.71\)
\(72^{44}-72^{43}=72^{43}\left(72-1\right)=72^{43}.71\)
\(\Rightarrow72^{45}-72^{44}>72^{44}-72^{43}\)
b) T a có: \(2^{3n}=8^n\)
\(3^{2n}=9^n\)
\(\Rightarrow2^{3n}< 3^{2n}\)
a. Ta có: \(5^{36}=\left(5^3\right)^{12}=125^{12}\)
\(11^{24}=\left(11^2\right)^{12}=121^{12}\)
\(Do\)\(125^{12}>121^{12}\Rightarrow5^{36}>11^{24}\)
b) Ta có; \(6.5^{22}>5.5^{22}=5^{23}\)
\(C=72^{45}-72^{44}\)
\(=72^{44}\left(7-1\right)=72^{44}.6\)
\(D=72^{44}-72^{43}\)
\(=72^{43}\left(7-1\right)=72^{43}.6\)
DO : \(72^{44}>72^{43}\)nên : \(72^{44}.6>72^{43}.6\)
hay : \(C>D\)
7245-7244=7244.(72-1)=7244.71
7244-7243=7243.(72-1)=7243.71
Do 7244.71>7243.71
Nên 7245-7244>7244-7243
đặt A=72^45-72^44=72^44.(72-1) (1)
B=72^44-72^43=72^43.(72-1) (2)
từ 1 và 2 => A>B
a)Ta có:A=333444=(3.111)444=3444.111444
=(34)111.111444=81111.111444
B=444333=(4.111)333=4333.111333
=(43)111.111333=64111.111333
Vì 81111.111444 > 64111.111333 nên A>B
Vậy A > B
b)Ta có:C=7245-7244=7244.72-7244=7244.(72-1)
D=7244-7243=7243.72-7243=7243.(72-1)
Vì 7244.(72-1) > 7243.(72-1) nên C>D
Vậy C>D
a)
A=333444
A=(3334)111
A=12296370321111
B=444333
B=(4443)111
B=87528384111
Mà12296370321>87528384
Nên12296370321111>87528384111
VậyA=333444>B=444333