Bài giải
Ta có :
\(2^{91}=2^{90}\cdot2=\left(2^3\right)^{30}\cdot2=8^{30}\cdot2>5^{30}\)
\(\Rightarrow\text{ }2^{91}>5^{30}\)
\(21^8=\left(21^2\right)^4=441^4>54^4\)
\(\Rightarrow\text{ }54^4< 21^8\)
\(108^{50}=\left(108^2\right)^{25}=11664^{25}\)
\(73^{75}=\left(73^3\right)^{25}=389017^{25}\)
\(\text{Vì }11664^{25}< 389017^{25}\text{ }\Rightarrow\text{ }108^{50}< 73^{75}\)
Bài giải
\(2^{91}=2^{90}\cdot2=\left(2^3\right)^{30}\cdot2=8^{30}\cdot2>5^{30}\)
\(\Rightarrow\text{ }2^{91}>5^{30}\)
\(21^8=\left(21^2\right)^4=441^4>54^4\)
\(\Rightarrow\text{ }54^4< 21^8\)
\(108^{50}=\left(108^2\right)^{25}=11664^{25}\)
\(73^{75}=\left(73^3\right)^{25}=389017^{25}\)
\(\text{Vì }11664^{25}< 389017^{25}\text{ }\Rightarrow\text{ }108^{50}< 73^{75}\)
