Ta có: \(9^{12}=\left(3^2\right)^{12}=3^{24}=\left(3^3\right)^8=27^8\)
Vì \(27^8>26^8\)
\(\Rightarrow9^{12}>26^8\)
Ta có :
912 = (32)12 = 324 = 33.8 = (33)8 = 278
Vì 278 > 268
=> 912 > 268
Có 9^12=(3^2)^12=3^24=3^3.8=(3^3)^8=27^8
Ma 27^8>36^8 suy ra 9^12>26^8
Vay 9^12>26^8