ta có : 227 =(23)9 = 89
318 = (32)9 = 98 > 89
=> 227 < 318
\(2^{27}=\left(2^3\right)^9=8^9\)
\(3^{18}=\left(3^2\right)^9=9^9\)
\(vi9>8=>...\)
Ta có:
\(2^{27}=\left(2^3\right)^9=8^9\)
\(3^{18}=\left(3^2\right)^9=9^9\)
Vì 8<9 =>\(8^9< 9^9hay\)\(2^{27}< 3^{18}\)
Ta thấy:
2^27=(2^3)^9=8^9
3^18=(3^2)^9=9^9
Vì 8^9<9^9
=>2^27<3^18
Vậy 2^27<3^18