\(\left(\dfrac{1}{3}-x\right)^2+\dfrac{3}{2}=\dfrac{1}{2}\)
\(\Rightarrow\left(\dfrac{1}{3}-x\right)^2=-1\)
Mà \(\left(\dfrac{1}{3}-x\right)^2\ge0\)
\(\Rightarrow\)Không có giá trị x thỏa mãn
Vậy...
tìm x biết
1) |x+1|+|x-2|+|x+3|=6
2) |1-x|+3|x-3|-2|x-2|=x
3) |x+1|+|x+2|+|x+3|=4x
4) |x+1|+|x+2|+|x+3|+|x+4|=5x+1
5)||2x-3|-x+1|=4x-1
1. So sánh:
a) 25^50 và 2^300
b) 625^15 và 12^45
2. Tính hợp
a) -4 5/7 . 33 1/3 + 4 5/7 . 47 . 1/3
b) (3/5 + 5 2/3 ) : 121/19 + ( -5 2/3 + 2/3 ) : 121/19
c)( -1/4) . ( 6 2/11) + 3 9/11 . (-1/4)
d) 4 . ( -1/3)^3 - 2 . ( -1/2)^2 + 3. (-1/2) +1
3. Tìm x
a) GTTĐ của x - 2 = 5
b) 3x . ( x - 2/5) = 0
c) 3 ^x+2 +3^x = 270
d) 3/4 + 1/4 :x = 2/5
e) (9/5 - x)^2 = 16/25
Tìm x biết
a) 3(1-4x).(x-1)+4(3x-2).(x+3)=-27
b) (x+3).(x2-3+9)-.(x-1).(x+1)=27
c) 2x2+3(x-1).(x+1)=5x.(x+1)
d) 8(x-1).(x+5)-(x+2).(x+5)=3(x-1).(x+2)
* x/2-x/3=1/4
* 1/2.x:2/5=-3/2:5/4
* 2/3.x-1/3.x=5/12
1. Tìm x,biết
a,x^2-2x-3=0
b,2x^2+3=-5x
c,2(x-3)(x+1)=(2x+1)(x-3)-12
d,(2x-1)^2+(2-x)(2x-1)=0
e,-x^2+5x=6
g,(x+3)^2>6x+13
h,(x-3)^2<x^2-5x+1
Please,help me !
Tìm x biết :
1. x^2-3/5x=0
2./x-4/5/=1/10
3./x-1/5/-(-1/3)^2=(-2)^3
4.11/3x-1=2.(x+2/11)
a/ 4^(x-3)+4^(x-5)=68
b/ 1/3-1/3:|2x-1|=-2/3
c/ 2|x-1|-3|x+5|=0
d/( √x +7)^10 =1024*125^2*25^2
a) -3/20 - 2/5 b)-1/2x-5/3=1/2 c) 3/7 - 2/3x=-5/3 d) 3/8.x-5/2=1/2.x-1/3
Tìm GTNN:
a)(x-2)^2; b)(2x+1)^2-1; x)(2x+1)^4-3; d)(x-1)^2-(y-1)^2+3; e)/x-3/+y^2-10
HELP ME
Bài 2:Tìm x,biết:
1, 4/5-x=1/3
2, 2/3+5/3x=5/7
3, -12/13x+5=5 1/13
4, x:(-2 1/4)+1,5=-3/4
5,GTTĐ của x -3/4 - 1/4=0
6, 6-GTTĐ của 1/2-x = 2/3
7, (x-1)2=4/9
