52x . 5 = 52018 : 52015
52x . 51 = 53
52x + 1 = 53
=> 2x + 1 = 3
2x = 3 - 1
2x = 2
x = 2 : 2
x = 1
k mk nha Phan THị Việt KHuê
\(5^{2x}.5=\frac{5^{2018}}{5^{2015}}\)
\(\Leftrightarrow5^{2x+1}=5^3\)
\(\Leftrightarrow2x+1=3\)
\(\Leftrightarrow2x=3-1=2\)
\(\Leftrightarrow x=\frac{2}{2}=1\)
Vậy \(x=1\)
\(5^{2x}\).5=\(5^{2018}\):\(5^{2015}\)
\(5^{2x}\).5=\(5^3\)
\(5^{2x}\)=\(5^3\):5
\(5^{2x}\)=\(5^2\)
suy ra x=1 k cho mình nha
Tìm x :
\(5^{2x}.5=5^{2018}:5^{2015}\)
\(\Leftrightarrow5^{2x}.5^1=5^3\)
\(\Rightarrow2x+1=3\)
\(\Rightarrow x=1\)
