|2x+7|+2/5>=2/5
Dấu = xảy ra khi x=-7/2
Tìm GTLN hoặc GTNN
\(C=\left|2x-\dfrac{3}{5}\right|+1,\left(3\right)\)
\(D=\left|x-3\right|+\left|x+2\right|\)
\(\left(2x-1\right)^2-\dfrac{1}{4}=2\)
\(\left(-2\dfrac{1}{5}+\dfrac{2}{7}-\dfrac{12}{13}\right)-\left(-\dfrac{5}{7}+\dfrac{1}{13}\right)\)
\(b,\dfrac{x}{2}-\left(\dfrac{3x}{5}-\dfrac{13}{5}\right)=-\left(\dfrac{7}{5}+\dfrac{7}{10}.x\right)\)
\(c,\dfrac{2x-3}{3}+\dfrac{-3}{2}=\dfrac{5-3x}{6}-\dfrac{1}{3}\)
\(d,\dfrac{2}{3x}-\dfrac{3}{12}=\dfrac{4}{5}-\left(\dfrac{7}{x}-2\right)\)
\(e,2\left(x-1\right)=\left(x-1\right)^2\)
Tìm GTNN của
\(A=\dfrac{1}{2}+\left|2x-1\right|\)
\(B=\dfrac{\left|x\right|+2007}{2008}\)
tìm gtnn của:
B=(2x)2+2(y-1)2-5
C=\(\dfrac{5}{3-\left(4x+1\right)^2}\) (C>0)
Câu 1: Thực hiện phép tính
a, \(40\dfrac{1}{4}:\dfrac{5}{7}-25\dfrac{1}{4}:\dfrac{5}{7}-\dfrac{1}{2021}\)
b, \(\left|\dfrac{-5}{9}\right|.\sqrt{81}-2021^0.\dfrac{16}{25}\)
Câu 2: Tìm x
\(3\left(x-\dfrac{1}{3}\right)-7\left(x+\dfrac{3}{7}\right)=-2x+\dfrac{1}{3}\)
Tìm GTNN của các biểu thức:
2) B = \(\dfrac{-5}{\left(3x-4\right)^2+2}\)
4) D = \(\dfrac{3x^2+3}{3x^2+7}\)
a) Tìm GTNN Của:
A=\(\left(2x+\dfrac{1}{3}\right)^4-1\)
a) Tìm GTLN Của:
B=\(-\left(\dfrac{4}{9}x-\dfrac{2}{15}\right)^6+3\)
Tìm GTNN của biểu thức \(\left[\left(x+\dfrac{1}{2}\right)^2+\dfrac{5}{4}\right]^2\)
1. Tìm x
a. 2.(4-3x)+2x=5(2x-3)
b. \(\dfrac{1}{2}-\left(2x-\dfrac{1}{3}\right)^2=\dfrac{7}{18}\)
