a)\(\left|2x-1\right|=x+3\\ \Rightarrow\left\{{}\begin{matrix}2x-1\ge0\Rightarrow2x-1=x+3\\2x-1< 0\Rightarrow1-2x=x+3\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=4\\x=\frac{-2}{3}\end{matrix}\right.\)
vậy...
giải pt
a) \(\sqrt[3]{x+6}+\sqrt{x-1}=x^2-1\)
b) \(\sqrt[3]{x-9}+2x^2+3x=\sqrt{5x-1}+1\)
c) \(\sqrt{3x+1}-\sqrt{6-x}+3x^2-14x-8=0\)
d) \(\sqrt{x+1}-2\sqrt{4-x}=\frac{5\left(x-3\right)}{\sqrt{2x^2+18}}\)
e) \(x^3+5x^2+6x=\left(x+2\right)\left(\sqrt{2x+2}+\sqrt{5-x}\right)\)
giải pt
a) \(3\sqrt{x}+\frac{3}{2\sqrt{x}}=2x+\frac{1}{2x}-7\)
b) \(5\sqrt{x}+\frac{5}{2\sqrt{x}}=2x+\frac{1}{2x}+4\)
c) \(\sqrt{2x^2+8x+5}+\sqrt{2x^2-4x+5}=6\sqrt{x}\)
d) \(x+1+\sqrt{x^2-4x+1}=3\sqrt{x}\)
e) \(x^2+2x\sqrt{x-\frac{1}{x}}=3x+1\)
f) \(x^2-6x+x\sqrt{\frac{x^2-6}{x}}-6=0\)
g) \(\frac{3x^2}{3+\sqrt{x}}+6+2\sqrt{x}=5x\)
h) \(\frac{x^2}{4-3\sqrt{x}}+8=3\left(x+2\sqrt{x}\right)\)
giải các phương trình chứa ẩn ở mẫu sau đây dạng \(\frac{p\left(x\right)}{q\left(x\right)}-\frac{r\left(x\right)}{q\left(x\right)}=a\)
a) \(\frac{2\left(3-7x\right)}{x+1}=\frac{1}{2}\)
b) \(\frac{1}{\sqrt{x}-2}-1=\frac{3-\sqrt{x}}{\sqrt{x}-2}\)
c) \(\frac{8-x}{x-7}-8=\frac{1}{x-7}\)
d) \(\frac{14}{3x-12}-\frac{x+2}{x-4}=\frac{3}{8-2x}-\frac{5}{6}\)
e) \(\frac{5x-1}{3x+2}=\frac{5x-7}{3x-1}\)
Mn giup e vs ah, thenk kiu :3333
giải các phương trình chứa ẩn ở mẫu sau đây dạng \(\frac{p\left(x\right)}{q\left(x\right)}-\frac{r\left(x\right)}{q\left(x\right)}=a\)
a) \(\frac{2\left(3-7x\right)}{x+1}=\frac{1}{2}\)
b) \(\frac{1}{\sqrt{x}-2}-1=\frac{3-\sqrt{x}}{\sqrt{x}-2}\)
c) \(\frac{8-x}{x-7}-8=\frac{1}{x-7}\)
d) \(\frac{14}{3x-12}-\frac{x+2}{x-4}=\frac{3}{8-2x}-\frac{5}{6}\)
Giải các phương trình sau:
a)\(\frac{2x-5}{2x^2+3x-5}+\frac{3x+1}{1-x}=\frac{x+20}{4x+10}\)
b)\(\sqrt{5x+1}=\sqrt{14x+7}+\sqrt{2x+3}\)
c)\(\sqrt{x+3}-\sqrt{x+1}=\sqrt{5x+7}\)
d)\(\sqrt{\left(x-3\right)^2\left(x-1\right)}=x-3\)
e)\(\sqrt{x^2+2x+2}=1-x\)
f)\(\sqrt{x^4+x^2+4}=x^2+2\)
g)\(2x^2-6x+1=\sqrt{4x+5}\)
h)\(x^2+\sqrt{x+11}=11\)
1)2x(25x-4)-(5x-2)(5x+1)=8 / 5)\(2\left(x-2\right)-3\left(3x-1\right)=\left(x-3\right)\)
2)x(4x-3)-(2x-2)(2x-1)=5 / 6)\(\frac{2}{x+1}-\frac{1}{x-2}=\frac{3x-11}{\left(x+1\right)\left(x-2\right)}\)
3)\(\frac{5}{2x+3}+\frac{3}{9-x^2}=\frac{8}{7\left(x=3\right)}\) / 7)\(\frac{5x-2}{6}+\frac{3-4x}{2}=2-\frac{x+7}{3}\)
4)\(\frac{2}{3\left(x-2\right)}+\frac{5}{12-3x^2}=\frac{3}{4\left(x+2\right)}\) / 8)\(\frac{2}{x+1}-\frac{1}{x-2}=\frac{3x-11}{\left(x+1\right)\left(x-2\right)}\)
Giải các phương trình sau:
a)\(\left|x^2-3x-5\right|+2\left|2x-1\right|=x^2-4\)
b)\(\frac{4}{2x+1}+\frac{3}{2x+2}=\frac{2}{2x+3}+\frac{1}{2x+4}\)
c)\(\frac{2x-5}{2x^2+3x-5}+\frac{3x+1}{1-x}=\frac{x+20}{4x+10}\)
d)\(\frac{1}{x^2+5x+4}+\frac{1}{x^2+11x+28}+\frac{1}{x^2+17x+70}=\frac{3}{4x-2}\)
1. Giải các phương trình sau:
a)\(\sqrt[4]{x-\sqrt{x^2-1}}+\sqrt[]{x+\sqrt{x^2-1}}=2\)
b)\(x^2-x-\sqrt{x^2-x+13}=7\)
c)\(x^2+2\sqrt{x^2-3x+1}=3x+4\)
d)\(2x^2+5\sqrt{x^2+3x+5}=23-6x\)
e)\(\sqrt{x^2+2x}=-2x^2-4x+3\)
f)\(\sqrt{\left(x+1\right)\left(x+2\right)}=x^2+3x+4\)
2. Giải các bất phương trình sau:
1)\(\sqrt{x^2-4x+5}\ge2x^2-8x\)
2)\(2x^2+4x+3\sqrt{3-2x-x^2}>1\)
3)\(\dfrac{\sqrt{-3x+16x-5}}{x-1}\le2\)
4)\(\sqrt{x^2-3x+2}+\sqrt{x^2-4x+3}\ge2\sqrt{x^2-5x+4}\)
5)\(\dfrac{9x^2-4}{\sqrt{5x^2-1}}\le3x+2\)
giải pt
a) \(x+\sqrt{x+8}\left(1-\sqrt{x+8}\right)=\sqrt{x}+\sqrt{x+3}-8\)
b) \(2\left(2-x\right)=\sqrt{2x-4}\left(\sqrt{5-x}-\sqrt{3x-3}\right)\)
c) \(\sqrt[3]{24+x}.\sqrt{12-x}-6\sqrt{12-x}=x-12\)
d) \(\frac{x-1}{2\sqrt{3-2x}-3}=\frac{x-1}{3-2\sqrt[3]{5+3x}}\)
