giải phương trình: \(\frac{x^2}{2}+\frac{18}{x^2}=13\left(\frac{x}{2}-\frac{3}{x}\right)\)
Q= \(\frac{\sqrt{a}\left(1-a\right)^2}{1-a^2}:\left[\left(\frac{1-a\sqrt{a}}{1-\sqrt{a}}+\sqrt{a}\right).\left(\frac{1+a\sqrt{a}}{1+\sqrt{a}}-\sqrt{a}\right)\right]\)
a) Rút gọn biểu thức Q? b) Xét dấu of biểu thức P= a.(Q-\(\frac{1}{2}\))
1) Giải pt: \(x=\left(2016+\sqrt{x}\right)\left(1-\sqrt{x}\right)\)
2) Giải hpt: \(\left\{{}\begin{matrix}\left(x+2\right)^2+4\left(y-1\right)^2=4xy+13\\\sqrt{\frac{x^2-xy-2y^2}{x-y}}+\sqrt{x+y}=\frac{2}{\sqrt{x^2-y^2}}\end{matrix}\right.\)
Giải PT : \(\left(\frac{x}{x-1}\right)^2+\left(\frac{x}{x+1}\right)^2=\frac{10}{9}\)
Giải pt : \(\frac{1}{\left(x+1\right)^2}+\frac{1}{4x^2}+\frac{1}{\left(x-1\right)^2}=\frac{\left(3x^2+1\right)^2}{144}\)
Giải hpt:
\(\left\{{}\begin{matrix}4xy+4\left(x^2+y^2\right)+\frac{3}{\left(x+y\right)^2}=\frac{85}{3}\\2x+\frac{1}{x+y}=\frac{13}{3}\end{matrix}\right.\)
Giải HPT:
\(\left\{{}\begin{matrix}\left|y+\frac{1}{x}\right|+\left|\frac{13}{6}+x-y\right|=\frac{13}{6}+x+\frac{1}{x}\\x^2+y^2=36\end{matrix}\right.\)
giải hệ phương trình:
1, \(\left\{{}\begin{matrix}2y\left(4y^2+3x^2\right)=x^4\left(x^2+3\right)\\2012^x\left(\sqrt{2y-2x+5}-x+1\right)=4024\end{matrix}\right.\)
2, \(\left\{{}\begin{matrix}x^3-2x^2y-15x=6y\left(2x-5-4y\right)\\\frac{x^2}{8y}+\frac{2x}{3}=\sqrt{\frac{x^3}{3y}+\frac{x^2}{4}}-\frac{y}{2}\end{matrix}\right.\)
3, \(\left\{{}\begin{matrix}8\left(x^2+y^2\right)+4xy+\frac{5}{\left(x+y\right)^2}=13\\2x+\frac{1}{x+y}=1\end{matrix}\right.\)
Giải hệ pt
\(\left\{{}\begin{matrix}\frac{x^2}{\left(y+1\right)^2}+\frac{y^2}{\left(x+1\right)^2}=\frac{1}{2}\\3xy=x+y+1\end{matrix}\right.\)
Giải hệ phương trình: \(\left\{{}\begin{matrix}\sqrt{\frac{x+3}{x}}+\frac{2y}{y-2}=8\\2\sqrt{\frac{x+3}{x}}+\frac{3y}{y-2}=13\end{matrix}\right.\)