\(25.5^{11x}=5^4\)
\(\Leftrightarrow5^2.5^{11x}=5^4\)
\(\Leftrightarrow5^{11x}=\frac{5^4}{5^2}=5^2\)
\(\Leftrightarrow11x=2\)
\(\Leftrightarrow x=\frac{2}{11}\)
Vậy \(x=\frac{2}{11}\)
25.5x11=54
Mà: 54=625
=>25.5x11=625
=>5x11=625:25
=>5x11=25
Mà: 52=25
=> x11=2
=>x=2:11
=>x=2/11