\(2^{500}\)và \(5^{200}\)
\(2^{500}=\left(2^5\right)^{100}=32^{100}\)
\(5^{200}=\left(5^2\right)^{100}=25^{100}\)
Ta thấy :
\(32^{100}>25^{100}\Rightarrow2^{500}>5^{200}\)
\(31^{11}\) và \(17^{14}\)
\(31^{11}< 32^{12}=\left(2^5\right)^{12}\)
\(17^{14}< 18^{14}=\left(9.2\right)^{14}\)
Ta thấy \(\left(2^5\right)^{12}< \left(9.2\right)^{14}\Rightarrow31^{11}>17^{14}\)