\(\Leftrightarrow3^x=y\left(y+2\right)\)
\(\Rightarrow\left\{{}\begin{matrix}y=3^a\\y+2=3^b\end{matrix}\right.\) với \(b>a\) và \(a+b=x\)
\(\Rightarrow3^b-3^a=2\Rightarrow3^a\left(3^{b-a}-1\right)=2\)
Nếu \(a>0\Rightarrow3^a\left(3^{b-a}-1\right)>3>2\) (ktm)
\(\Rightarrow a=0\Rightarrow b=1\)
\(\Rightarrow\left\{{}\begin{matrix}y=1\\x=1\end{matrix}\right.\)
Tim nghiem nguyen duong cua pt:\(\frac{xy}{z}+\frac{yz}{x}+\frac{zx}{y}=3\)
tim nghiem nguyen cua pt
\(x^2+xy+y^2=x^2y^2\)
tim nghiem nguyen duong cua phuong trinh xy^2+2xy+x = 32y
tim gia tri nguyen cua m de hpt
\(3x-y=2m-1 va x+2y=3m-2\)
co nghiem (x;y) tm x^2 + 2y^2 = 9
tim x,y nguyen duong thoa
x=can2x(x-y)+2y-x=2
tim nghiem nguyen duong cua pt 2^m!+6^n=10^n
cho phuong trinh x2+(2m-5)x-n=0 cho m=5 tim n nguyen nho nhat de bphuong trinh co nghiem duong
tim nghiem nguyen cua pt
xy + x - 2y = 5
tim x , y nguyen duong thoa man
1003x +2y = 2008
