\(2-7\ge4x-4\)
\(\Leftrightarrow-5-4x+4\ge0\)
\(\Leftrightarrow-1-4x\ge0\)
\(\Leftrightarrow-4x\ge1\)
\(\Leftrightarrow x\le-\dfrac{1}{4}\)
\(\Leftrightarrow-11x\ge-6\)
\(\Leftrightarrow x\ge\dfrac{6}{11}\)
\(\Leftrightarrow x\le\dfrac{6}{11}\)
\(2-7\ge4x-4\)
\(\Leftrightarrow-5-4x+4\ge0\)
\(\Leftrightarrow-1-4x\ge0\)
\(\Leftrightarrow-4x\ge1\)
\(\Leftrightarrow x\le-\dfrac{1}{4}\)
\(\Leftrightarrow-11x\ge-6\)
\(\Leftrightarrow x\ge\dfrac{6}{11}\)
\(\Leftrightarrow x\le\dfrac{6}{11}\)
Giai các bpt sau
a,\(\dfrac{x-1}{2}-\dfrac{7x+3}{15}\le\dfrac{2x+1}{3}+\dfrac{3-2x}{5}\)
b,\(\dfrac{2x+1}{-3}-\dfrac{2x^2+3}{-4}>\dfrac{x\left(5-3x\right)}{-6}-\dfrac{4x+1}{-5}\)
câu 1:giải các pt và bpt sau:
a,17x - 5(x+3)= 2x + 5
b,3/x+2 - 5/x-2 = 11x + 23/(x+2)(x-2)
c,5x + 7 ≥ 3(x-1)
d,3x-1/x+1 = -2/5
e,(2x-1)(2x+1)= 4x2 + 3x + 2
f,x-3^3 -7+3x
g,7x-5 < 2(4x-1)+7
Giải BPT: \(\dfrac{7x-8}{32}\) - \(\dfrac{5-x}{16}\) > \(\dfrac{x+9}{2}\) + \(\dfrac{1}{8}\)
Giải bpt : \(5x-\frac{3-2x}{2}>\frac{7x-5}{2}+x\)
Giải BPT sau
-4(2x-1)2-5(72-8) < hoặc = (4x-2)
b) (x+2)2-(5+x)2 < hoặc = -2(4x+5)
Giải các BPT sau
a) \(\dfrac{3-2x}{5}\)-\(\dfrac{4x+1}{3}\)<\(\dfrac{-2+x}{2}\)-\(\dfrac{1}{4}\)
b) (x+2)2-(5+x)2 < hoặc = -2(4x+5)
giải bpt
a, x2 - 7x +12 > 0
b, (4 - x ) (5x +1) > (x -4)(2x+3)
giải bpt
\(-4x^4-3x^2\ge0\)