tham khảo:
Ta có :227= 29.3=5123
: 318=36.3=7293
227 = (23)9 = 89
318 = ( 32)9 = 99
Vì 9 > 8 nên : 99 > 89
Vậy suy ra: 318 > 227
\(2^{27}=\left(2^3\right)^9=8^9\\ 3^{18}=\left(3^2\right)^9=9^9\\ 8< 9\\ \Rightarrow8^9< 9^9\\ \Rightarrow2^{27}< 3^{18}\)
\(2^{27}=\left(2^3\right)^9=8^9\)
\(3^{18}=\left(3^2\right)^9=9^9\)
Do: 8<9 nên \(8^9< 9^9
hay
2^{27}< 3^{18}\)
\(Ta.có:2^{27}=\left(2^3\right)^9=8^9\\ 3^{18}=\left(3^2\right)^9=9^9\)
Vì 8 < 9 nên 89 < 99 hay \(2^{27}< 3^{18}\)
