\(4^{20}=\left(2^2\right)^{20}=2^{40}\)
\(8^{10}=\left(2^3\right)^{10}=2^{30}\)
\(2^{40}>2^{30}\)\(\Rightarrow4^{20}>8^{10}\)
\(4^{20}=\left(2^2\right)^{20}=2^{40}\)
\(8^{10}=\left(2^3\right)^{10}=2^{30}\)
\(\Rightarrow2^{40}>2^{30}\)
\(\Rightarrow4^{20}>8^{10}\)