\(D=2\cdot\dfrac{1}{8}-\dfrac{1}{3}\cdot\dfrac{1}{4}-\dfrac{1}{2}=\dfrac{1}{4}-\dfrac{1}{12}-\dfrac{1}{2}=-\dfrac{1}{3}\)
D= 2 . 1/8 - 1/3 . 1/4 - 1/2
= 1/4 - 1/12 - 1/2
= -1/3
2x3x-405=3x-1
2x3x-405=3x-1
a , |x-2|=2
b , |x+1|=2
c , |x-4/5|=3/4
d , 6-|1/2-x|=2/5
e , |x+3/5|-1/2=1/2
f , 2-|x-2/5|=-1/2
g , 0,2 + |x-2,3|=1,1
h , -1+|x+4,5|=-6,2
Help me
a,2^12.3^54^6.81/(2^2.3)^6+8^4.3^5
b, 4.(-1/2)^3-2.(-1/2)^2+3.(-1/2)+1
c, 5x-7=3x+9
d, 5x-|9-7x|=3
e, -5+|3x-1|+6=|-4|
g, (x-1)^2=(x-1)^4
h, 5^-1.25=125
i, |x+1|+|x+2|+|x+3|=4x
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
Bài 1 : Tìm GTLN, GTNN :
a, A= x-|x|
b, B= \(\dfrac{1}{\left|x-2\right|+3}\)
c, C= \(\dfrac{x-2}{\left|x\right|}\)
d, D=|x+5|+2-x
Bài 2 : Tìm x thuộc Q, biết :
a,\(\left|x+\dfrac{4}{15}\right|-\left|-3,75\right|=-\left|-2.15\right|\)
b,|x-1|=x-1
c,|x-1|+3x=1
d,2.|x|+3.|1-x|-5.|x-3|=0
Bài 1: Tìm x, biết
a,\(\dfrac{1}{2}+\dfrac{2}{3}.x=\dfrac{4}{5}\)
b,\(x+\dfrac{1}{4}=\dfrac{4}{3}\)
c,\(\dfrac{3}{5}x-\dfrac{1}{2}=-\dfrac{1}{7}\)
d,\(|x-\dfrac{4}{5}|=\dfrac{3}{4}\)
e,\(\dfrac{1}{2}-lxl=\dfrac{1}{3}\)
Tìm x thuộc Z biết :
a , 2x-1=16
b , (x-1)2=25
c , (x-1)x+2=(x-1)x+6
d , (x+200)100+|y+4|=0
