\(5^{x+1}=125\\ \Rightarrow5^{x+1}=5^3\\ \Rightarrow x+1=3\\ \Rightarrow x=2\)
\(5^{x+1}=125\)
\(\Leftrightarrow5^{x+1}=5^3\)
\(\Leftrightarrow x+1=3\)
\(\Leftrightarrow x=2\)
\(5^{x+1}=125\)
\(\Leftrightarrow5^x.5=125\)
\(\Rightarrow5^x=\frac{125}{5}\)
\(\Rightarrow5^x=25\)
\(\Rightarrow5^x=5^2\)
\(\Rightarrow x=2\)
\(5^{x+1}=125\)
\(\Rightarrow5^{x+1}=5^3\)
\(\Rightarrow x+1=3\)
\(\Rightarrow x=3-1=2\)
Vậy : \(x=2\)
\(5^{x+1}=125\)
\(5^{x+1}=5^3\)
Suy ra \(x+1=3\)
\(x=2\)
