\(\left(1\right)\Leftrightarrow\left(x+y\right)^2-1+2xy\left(\frac{1}{x+y}-1\right)=0\)
\(\Leftrightarrow\left(x+y+1\right)\left(x+y-1\right)-2xy.\frac{x+y-1}{x+y}=0\)
\(\Leftrightarrow x+y-1=0\text{ }or\text{ }x+y+1=\frac{2xy}{x+y}\text{ }\left(3\right)\)
\(\left(3\right)\Leftrightarrow\left(x+y\right)^2+\left(x+y\right)=2xy\)
\(\Leftrightarrow x^2+y^2+x+y=0\text{ }\)- vô nghiệm do x+y>0
\(\int^{\left(x-1\right)^2+y^2=\sqrt[3]{x\left(2x+1\right)}}_{3x^2-x+\frac{1}{2}=y\sqrt{x^2+x}}\) giải hpt.............
giải hpt:
\(\hept{\begin{cases}x+\frac{2xy}{\sqrt[3]{x^2-2x+9}}=x^2+y\\y+\frac{2xy}{\sqrt[3]{y^2-2y+9}}=y^2+x\end{cases}}\)
Giải hpt :
\(\hept{\frac{\sqrt{\frac{x^2+y^2}{2}}+\sqrt{\frac{x^2+xy+y^2}{3}}=x+y}{x\sqrt{2xy+5x+3}=4xy-5x-3}}\)
giải hpt \(\int^{\frac{x}{y}-\frac{x}{y+12}=1}_{\frac{x}{y-12}-\frac{x}{y}=2}\)
Giải hpt :
\(\int^{\frac{x^2}{\left(y+1\right)^2}+\frac{y^2}{\left(x+1\right)^2}=\frac{1}{2}}_{3xy=x+y+1}\)
a)\(\int^{\frac{x}{y}-\frac{x}{y+12}=1}_{\frac{x}{y-12}-\frac{x}{y}=2}\)
b)\(\int^{4\left(x+y\right)=5\left(x-y\right)}_{\frac{40}{x+y}+\frac{40}{x-y}=9}\)
Giải các hpt
GIẢI hpt:
\(a,\hept{\begin{cases}\frac{1}{\sqrt{x}}+\sqrt{2.\frac{1}{y}}=2\\\frac{1}{\sqrt{y}}+\sqrt{2.\frac{1}{x}}=2\end{cases}}\)
\(b,\hept{\begin{cases}x+y+2=4\\2xy-x^2=16\end{cases}}\)
\(c,\hept{\begin{cases}x\left(x-1\right)\left(x-2y\right)=0\\\frac{1}{x}-\frac{1}{y}=\frac{4}{3}\end{cases}}\)
Giải HPT
\(\int^{\sqrt{x}+\sqrt{2y-x}=2\sqrt{y}}_{\sqrt[3]{y}+\sqrt{2-x}=2}\)
Giải pt : \(x^2+6x+1=\left(2x+1\right)\sqrt{x^2+2x+3}\)
Giải hpt \(\hept{\begin{cases}\left(\sqrt{y}+1\right)^2+\frac{y^2}{x}=y^2+2\sqrt{x-2}\\x+\frac{x-1}{y}+\frac{y}{x}=y^2+y\end{cases}}\)
