\(\left(x-\dfrac{1}{2}\right)\left(x-1\right)\ge0\)
\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{1}{2}\ge0\\x-1\ge0\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x\ge\dfrac{1}{2}\\x\ge1\end{matrix}\right.\)
Bài 1 : tìm x biết
a) ( /x/ - 1/4 ) . ( x2 - 9 ) = 0
b) ( /x/ + 2 ) . ( /x/ - 4 ) = 0
c) ( x2 - 1/4 ) . ( x2 - 1/10 ) = 0
d) ( x + 2 ) . ( x - 3 ) < 0
e) ( x - 1/4 ) . ( x + 1/2 ) > 0
Bài 1 : Tìm x biết
a) ( /x/ - 1/4 ) . ( x2 - 9 ) = 0
b) ( /x/ + 2 ) . ( /x/ - 4 ) = 0
c) ( x2 - 1/4 ) . ( x2 - 1/16 ) = 0
d) ( x + 2 ) . ( x - 3 ) < 0
e) ( x - 1/4 ) . ( x + 1/2 ) > 0
|x+3| + |x-y| =0
|x-1| + (y-2)2 =0
|x-3| + |x-2y+1| =0
|x-2| + |3x .y-5| =0
|x-2| - 3|2-x| =-10
|x-3|+ |x-y+1|=0
|x-1| + (y+5)2020 =0
tìm x
(x-1).(x+3)<0
(2-1).(x+5) >0
(x-5).(x+1/2)>0
(x+1).(x-3/2)<0
Bt1 tìm x
a) (3/x+1/5).(x-1/2)=0
b)(x-3/2).(2x+1)>0
c)(x-2).(x-4)<0
d)(3x+1/5).(2x-1)<0
e)(x-1).(3x-5)<0
Tìm x biết : x mũ 2 + ( x - 1 ) mũ 2 = 0 , ( x -1 ) . ( x - 5 ) > 0 , ( x + 1 ) . ( x - 2 ) < 0
Bài 1 : tìm số hữu tỉ x
1, (3 .x + 1/5) . ( x - 1/2 ) = 0
2, ( x - 3/2 ) . (2 .x +1 ) > 0
3, (2 - x ) . ( 4 /5 -x ) < 0
Tìm x, x thuộc Q:
a) (x +1) * (x - 2) < 0
b) (x - 2) * (x + 2/3) > 0
c) x + 1/2 * (x - 1/3) < 0
Bài 1 : Tìm x
a) 2/3 - 1/3 (x-3/2)-1/2(2x+1)=5
b) (x+1/2)(X-3/4)=0
c) 1/3 x + 3/5 (x+1)=0
d)x-8/2 > 0
e) x:(2/9 - 1/5 )=1/2
g) 1/3 + 1/2 : x = 1/5
Nhanh Nha
gia tri x>0 sao cho x^2:(-1/2)^3=-1/2
giá trị x thỏa mãn (x-1/2)^20=0
giá trị x<0 thỏa mãn x^2:(-1/2)^3=-1/2
