a) \(x-\dfrac{3}{2}< 0\)
\(\Leftrightarrow x< \dfrac{3}{2}\)
Vậy...
b) \(\dfrac{x-1}{x+1}=0\)
\(\Leftrightarrow x-1=0\)
\(\Leftrightarrow x=1\)
Vậy...
c) \(\dfrac{x+3}{x}>0\)
\(\Leftrightarrow1+\dfrac{3}{x}>0\)
\(\Leftrightarrow\dfrac{3}{x}>-1\)
\(\Rightarrow x< -3\)
Vậy...
tìm x biết
a. 13x(x-3/7)=0
b. 5x^2-1/3x=0
e. /x.(x+3)/=x
Tìm x, sao cho:
a) 1 - 2*x < 7
b) (x - 1)*(x - 2) > 0
c) ( x - 2)^2*(x + 1)*(x - 4) < 0
d) x^2*(x - 3) / x - 9 < 0
e) 5/x < 1
Tìm x, biết:
a) 2x^2 - x = 0
b) 2x - 1/ 3 + x < 0
Giúp tớ với các cậu ơi!!
Tìm x biết
a)\(\left(3x+\dfrac{1}{3}\right)\left(x-\dfrac{1}{2}\right)=0\)
b)\(\left(x-\dfrac{3}{2}\right)\left(2x+1\right)>0\)
c)\(\left(2-x\right)\left(\dfrac{4}{5}-x\right)< 0\)
d)\(\left(x-\dfrac{4}{7}\right):\left(x+\dfrac{1}{2}\right)>0\)
e)\(2\left(x+1\right)-\dfrac{1}{3}.\left(x-1\right)=\dfrac{2}{3}\)
k)\(\left|4x-0,2\right|=0,2\)
Tìm x biết:
a) x^2 > 0
b) x^2 < = 0
c) |x| = -|x+1|
d) |x| = -x^2
a) \(\left|2x-1\right|+\left|x+8\right|=4x\)
b) \(\left(\sqrt{x+1}\right)\left(\sqrt{x-3}\right)=0\)
c) \(3^x+3^{x+2}=2430\)
a,\(\sqrt{x+1}=7\)
b,(x-2).\(\left(x+\dfrac{2}{3}\right)\)>0
c,\(\left(\dfrac{2}{3}x-1\right).\left(\dfrac{3}{4}x+\dfrac{1}{2}\right)=0\)
Tìm x biết :
a/ x:0,16=9:x
b/ (72-x) :7=(x-70):9
c/ (x2-1)2 + ( x-y+3)2 =0
Tìm x biết :
(2x+4) . (x-3) > 0
x+5/x-1 < 0
(x-2) . (x+5) <0