Question

tìm số tự nhiên x,y biết :

\(2^{x+1}.3y=12x\)

Answer 1

\(2^{x+1}.3^y=12x\)

\(\Rightarrow\) \(2^{x+1}.3^y=\left(3.4\right)^x\)

\(\Rightarrow\) \(2^{x+1}.3^y=3^x.2^{2x}\)

\(\Rightarrow\) \(3^{y-x}=2^{x-1}\)

\(\Rightarrow\) \(y-x=x-1=0\)

\(\Rightarrow\) \(x=y=1\)