a. 3450 = (33)150 = 27150;
5300 = (52)150 = 25150
Vì 27150 > 25150
=> 3450 > 5300.
b. 333444 = (3.111)444 = 3444.111444 =(34)111.111444=81111.111444
444333=(4.111)333=4333.111333=(43)111.111333=64111.111333
Vì 81111 > 64111 và 111444 > 111333
=> 81111.111444 > 64111.111333
=> 333444 > 444333.
c. 2014.2016
= 2014.(2015+1)
= 2014.2015+2014 (1)
20152
=2015.2015
=2015.(2014+1)
=2015.2014+2015 (2)
Từ (1) và (2) => 2014.2016 < 20152.
b) 333\(^{444}\)và 444\(^{333}\)
Ta có :333\(^{444}\)(3.111)\(^{4.111}\)=(3\(^4\).111\(^4\))\(^{111}\)=(81.111\(^4\)).111
444\(^{333}\)(4.111)\(^{3.111}\)=4\(^3\).111\(^2\))\(^{111}\)=(64.111\(^3\))\(^{111}\)
vì 81>64 ; 111\(^4\)>111\(^3\) nêb (81.111\(^4\))\(^{111}\)>(64.113\(^3\))\(^{111}\)
hay 333\(^{444}\)>444\(^{333}\)