625 mu 5 > 125 mu 7
tk minh nha
ai tk minh thi se tk lai x 2
625^5=(5^4)^5=5^20
125^7=(5^3)^7=5^21
mà 5^20<5^21 =>625^5<125^7
Ta có : \(625^5=\left(5^4\right)^5=5^{20}\)
\(125^7=\left(5^3\right)^7=5^{21}\)
\(\Rightarrow5^{20}< 5^{21}\Leftrightarrow625^5< 125^7\)
\(625^5=\left(5^4\right)^5=5^{20}\)
\(125^7=\left(5^3\right)^7=5^{21}\)
Vì \(5^{20}< 5^{21}\)\(\Rightarrow625^5< 125^7\)