a, (2x-5)(x+2)/-4x+3>0
b, x-3/x+1>x+5/x-2
c, 3x-4/x-2>1
d, 2x^2+x/1-2x≥1-x
e, -3x^2-x+4/x^2+3x+5>0
f, 5x^2+3x-8/x^2-7x+6<0
Bài 2 : Giải các phương trình sau
1 , \(x\left(x+5\right)=2\sqrt[3]{x^2+5x-2}-2\)
2 , \(\sqrt[3]{x+5}+\sqrt[3]{x+6}=\sqrt[3]{2x+11}\)
3 , \(\sqrt[4]{x-\sqrt{x^2-1}}+\sqrt{x+\sqrt{x^2-1}}=2\)
4 , \(x^2-2x-8=4\sqrt{\left(4-x\right)\left(x+2\right)}\)
5 , \(x^2+5x+2+2\sqrt{x^2+5x+10}=0\)
6 , \(\sqrt{2x^2+3x-5}=x+1\)
7 , \(\left(x-1\right)\left(x-3\right)+3\sqrt{x^2-4x+5}-2=0\)
A) \(\frac{x^2-3x+24}{x^2-3x+3}\)<4
b) \(x^3-6x^2+11x-6\ge0\)
c) 2x3 - 5x2 -2x +2 < 0
d) 1< \(\frac{3x^2-7x+8}{x^2+12}\le2\)
e) \(\frac{5x-7}{x-5}
Giai các hệ bất phương trình sau :
a/ \(\left\{{}\begin{matrix}x^2+x+5< 0\\x^2-6x+1>0\end{matrix}\right.\)
b/ \(\left\{{}\begin{matrix}2x^2+x-6>0\\3x^2-10x+3\ge0\end{matrix}\right.\)
c/ \(\left\{{}\begin{matrix}-2x^2-5x+4< 0\\-x^2-3x+10>0\end{matrix}\right.\)
d/ \(\left\{{}\begin{matrix}x^2+4x+3\ge0\\2x^2-x-10\le\\2x^2-5x+3>0\end{matrix}\right.0}\)
e/ \(-4\le\dfrac{x^2-2x-7}{x^2+1}\le1\)
f/ \(\left\{{}\begin{matrix}-x^2+4x-7< 0\\x^2-2x-1\ge0\end{matrix}\right.\)
câu 1: lập bảng xét dấu để tìm nghiệm của bất pt sau:
a/\(4x^2-5x+1\ge0\)
b/\(3x^2-4x+1\le0\)
câu 2:
a/\(|x^2-3x+2|\le8-2x\)
b/\(x^2-5x+\sqrt{x\left(5-x\right)}+2< 0\)
c/\(\sqrt{8+2x-x^2}>6-3x\)
d/\(2\sqrt{1-\frac{2}{x}}+\sqrt{2x-\frac{8}{x}}\ge x\)
e/\(|x^2-4x+3|>2x-3\)
f/\(\sqrt{-x^2+6x-5}\le8-2x\)
g/\(x^2-8x-\sqrt{x\left(x-8\right)}< 6\)
h/\(3\sqrt{1-\frac{3}{x}}+\sqrt{3x-\frac{27}{x}}\ge x\)
giải các bất phương trình sau :
a) \(\left|x^2-2x-3\right|\le3x-3\)
b)\(\frac{2x-4}{\sqrt{x^2-3x-10}}>1\)
c)\(\sqrt{x+3}-\sqrt{7-x}>\sqrt{2x-8}\)
d)\(\left(2x-5\right)\sqrt{2x^2-5x+2}\le0\)
e)\(\left(x+1\right)\left(x+4\right)< 5\sqrt{x^2+5x+28}\)
f)\(\sqrt{3x^2+5x+7}-\sqrt{3x^2+5x+2}\ge1\)
xét dấu các biểu thức sau
a) \(\frac{x^2}{3x-8}\ge1\)
b) \(\frac{x^2-3x+24}{x^2-3x+3}
Bài 1 : giải các phương trình sau
1 , \(\left(x^2-6x\right)\sqrt{17-x^2}=x^2-6x\)
2 , \(\left(x^2+5x+4\right)\sqrt{x+3}=0\)
3, \(\sqrt{3x}+\sqrt{2x-2}=\sqrt{1-x}+2\)
4, \(\left(x^2-4x+3\right)\sqrt{x-2}=0\)
5 , \(\sqrt{x^2+3x-2}=\sqrt{1+x}\)
6 , \(\left(\sqrt{x-4}-1\right)\left(x^2-7x+6\right)=0\)
7, \(\sqrt{2x^2-8x+4}=x-2\)
8 , \(\sqrt{3x+7}-\sqrt{x+1}=2\)
1.|2x-1|≤x+2
2.(m+2)x² -3x+2m-3
3.5x-1>2x/5+3
4.(2x+1)² -3(x-3)>4x²+10
5.1<1/1-x
6.(x-5)²(x-3)/x+1≤0