ĐKXĐ: \(x\ge1\)
\(\Leftrightarrow x^2-4+1-\sqrt{x-1}+2-\sqrt{3x-2}=0\)
\(\Leftrightarrow\left(x-2\right)\left(x+2\right)-\frac{x-2}{\sqrt{x-1}+1}-\frac{3\left(x-2\right)}{\sqrt{3x-2}+2}=0\)
\(\Leftrightarrow\left(x-2\right)\left(x+2-\frac{1}{\sqrt{x-1}+1}-\frac{3}{\sqrt{3x-2}+2}\right)=0\)
Do \(x\ge1\Rightarrow\left\{{}\begin{matrix}x+2\ge3\\\frac{1}{\sqrt{x-1}+1}\le1\\\frac{3}{\sqrt{3x-2}+2}\le1\end{matrix}\right.\) \(\Rightarrow\) ngoặc phía sau luôn dương
Vậy p có nghiệm duy nhất \(x=2\)
giải pt \(\sqrt{3x^2-5x+1}-\sqrt{x^2-2}=\sqrt{3x^2-3x+3}-\sqrt{x^2-3x+4}\)
Giải các phương trình sau:
1) \(\sqrt{3x^2+5x+8}-\sqrt{3x^2+5x+1}=1\)
2) \(x^2-2x-12+4\sqrt{\left(4-x\right)\left(2+x\right)}=0\)
3) \(3\sqrt{x}+\dfrac{3}{2\sqrt{x}}=2x+\dfrac{1}{2x}-7\)
4) \(\sqrt{x}-\dfrac{4}{\sqrt{x+2}}+\sqrt{x+2}=0\)
5)\(\left(x-7\right)\sqrt{\dfrac{x+3}{x-7}}=x+4\)
6) \(2\sqrt{x-4}+\sqrt{x-1}=\sqrt{2x-3}+\sqrt{4x-16}\)
7) \(\sqrt{x+2\sqrt{x-1}}+\sqrt{x-2\sqrt{x-1}}=\dfrac{x+3}{2}\)
Giúp mình với ajk, mink đang cần gấp
Giải pt :
a) \(x^2+3x\sqrt[3]{3x+3}-12+\frac{1}{\sqrt{x}}=\frac{\sqrt{x}+8}{x}\)
b) \(\sqrt{\left(x-1\right)\left(3-x\right)}+\sqrt{x+2}=\sqrt{x-1}+\sqrt{3-x}+\frac{x}{2}\)
giải các phương trình sau
a)\(\sqrt{x^2-3x+3}+\sqrt{x^2-3x+6}=3\)
b)\(\sqrt{3-x+x^2}-\sqrt{2+x-x^2}=1\)
c)\(\sqrt{x+2\sqrt{x-1}}+\sqrt{x-2\sqrt{x-1}}=\dfrac{x+3}{2}\)
d)\(5\sqrt{x}+\dfrac{5}{2\sqrt{x}}=2x+\dfrac{1}{2x}+4\)
a,\(\sqrt{ }\)2x+3 + \(\sqrt{ }\)x+1 = 3x + 2\(\sqrt{ }\)(2x+3)(x+1)
b, \(\sqrt{ }\)3x -2 + \(\sqrt{ }\)x-1 = 4x -9 +2\(\sqrt{ }\)3x²-5x+2
c, \(\sqrt{ }\)x+2\(\sqrt{ }\)x-1 - \(\sqrt{ }\)x-2\(\sqrt{ }\)x-1 =-2
d, \(\sqrt{ }\)x² +12 + 5= 3x + \(\sqrt{ }\)x² +5
Giải pt:
\(3x^2+2x+3=\left(3x+1\right)\sqrt{x^2+3}\) \(x^2+3x+4=\left(x+3\right)\sqrt{x^2+x+2}\)
\(\left(4x-1\right)\sqrt{x^2+1}=2x^2+2x+1\) \(15x^2+2\left(x+1\right)\sqrt{x+2}=2-5x\)
\(4+2\sqrt{1-x}+3x=5\sqrt{1+x}+\sqrt{1-x^2}\)
Giải phương trình:
1) \(3\sqrt{x}+\frac{3}{2\sqrt{x}}=2\left(2x+\frac{1}{2x}\right)-3\)
2) \(\frac{x^2}{\sqrt{3x-2}}-\sqrt{3x-2}=1-x\)
Giải ft ( lập bảng xét dấu nếu cần )
1. \(\sqrt{5x-1}-\sqrt{3x-2}-\sqrt{x-1}=0\)
2. \(1+\frac{2}{3}\sqrt{x-x^2}=\sqrt{x}+\sqrt{1-x}\)
Giải phương trình:
a. \(4\sqrt{x+1}-1=3x+2\sqrt{1-x}+\sqrt{1-x^2}\)
b. \(\left(x+2\right)\left(\sqrt{2x+3}-2\sqrt{x+1}\right)+\sqrt{2x^2+5x+3}-1=0\)
