Tìm x biết: \(\left|x-\dfrac{1}{3}\right|\)+\(\dfrac{4}{5}\)\(=\left|-3,2+\dfrac{2}{5}\right|\)
Tìm x:
a) \(\left|x+1,2\right|=0,5\)
b) \(\left|x-\dfrac{1}{2}\right|+\dfrac{5}{6}=1\dfrac{1}{2}\)
c) \(\left|x-\dfrac{1}{2}\right|+\dfrac{4}{5}=\left|\left(-3,2\right)+\dfrac{2}{5}\right|\)
\(a.\left|x+2\right|+\left|x-1\right|=3-\left(y+2\right)^2\)
\(b.\left|x-5\right|+\left|1-x\right|=\dfrac{12}{\left|y+1\right|+3}\)
\(c.\left|y+3\right|+5=\dfrac{10}{\left(2x-6\right)^2+2}\)
\(d.\left|x-1\right|+\left|3-x\right|=\dfrac{6}{\left|y-3\right|+3}\)
Tìm x, biết:
a) \(\dfrac{x+1}{5}\) + \(\dfrac{x+3}{4}\) = \(\dfrac{x+5}{3}\) + \(\dfrac{x+7}{2}\)
b) \(\dfrac{3}{\left(x+2\right)\left(x+5\right)}\) + \(\dfrac{5}{\left(x+5\right)\left(x+10\right)}\) + \(\dfrac{7}{\left(x+10\right)\left(x+17\right)}\) = \(\dfrac{x}{\left(x+2\right)\left(x+17\right)}\)
Giải chi tiết cho mk cả hai phần nha!
Bài 4 : Tìm x,y biết :
a)\(3\dfrac{1}{4}-\dfrac{1}{4}\left|x-0,25\right|=\dfrac{1}{4}\)
b)\(\left|x-3\right|=-4\)
c)\(\left|x-\dfrac{1}{2}\right|+1=0\)
d)\(\left|x-\dfrac{1}{5}\right|=\left|\dfrac{3}{4}-2x\right|\)
e)\(\left|x+2\right|3=0\)
f)\(\left|2x-1\right|-\left|x+2\right|=0\)
g)\(\left|x+2\right|+\left|y-1\right|=0\)
h)\(\left|2x\right|+\left|y+\dfrac{1}{4}\right|=0\)
tìm giá trị lớn nhất của các biểu thức
\(A=5-3\left(2x-1\right)^2\) \(B=\dfrac{1}{2\cdot\left(x-1\right)^2+3}\) \(C=\dfrac{x^2+8}{x^2+2}\) \(D=\dfrac{1}{\sqrt{x}+3}\)
Tìm x biết :
a )\(\left|2x-1\right|=1,5\)
b)\(7,5-\left|5-2x\right|=-4,5\)
c)\(-3+\left|x\right|=-1\)
d)\(\left|2\dfrac{1}{3}-x\right|=\dfrac{1}{6}\)
e)\(\dfrac{5}{7}-\left|x+1\right|=\dfrac{1}{14}\)
f)\(\left|2x+3\dfrac{1}{5}\right|-\dfrac{1}{2}=\dfrac{3}{10}\)
Tìm GTNN của biểu thức sau:
a. B = \(\left|x+\dfrac{1}{2}\right|+\left|x+\dfrac{1}{3}\right|+\left|x+\dfrac{1}{4}\right|\)
b. \(C=3\left|x+-\dfrac{2}{5}\right|+\dfrac{5}{7}\)
Giúp với!
Bài 1: Tìm x biết
a) \(\left|x-\dfrac{1}{3}\right|=2\dfrac{1}{5}\)
b) \(\left|-x+\dfrac{2}{5}\right|+\dfrac{1}{2}=3,5\)
c) \(\left|x+\dfrac{1}{4}\right|-\dfrac{3}{4}=5\%\)
Bài 2: Rút gọn biểu thức sau nếu x < -1,3
A= \(\left|x+1,3\right|-\left|x-2,5\right|\)
B= \(\left|-x-1,3\right|-\left|x-2,5\right|\)
Bài 3: Tìm x biết
a) \(\left|x-1\right|=x-1\)
b) \(\left|x-1\right|=1-x\)
c) \(x-1< \left|x-1\right|\)
d) \(x-1>\left|x-1\right|\)