Violympic toán 7
Các câu hỏi tương tự
Tìm x biết: \(x-0.\left(3\right)=3\frac{1}{3}+0.4\left(2\right)\)
tìm x biết :
\(\left|x-1\right|+2.\left|x-2\right|+3.\left|x-3\right|+4.\left|x-4\right|+5.\left|x-5\right|+20x=0\)
Tìm x,y,z biết: \(\left|x-\frac{1}{2}\right|+\left|y+\frac{2}{3}\right|+\left|x^2+xz\right|=0\)
13 tháng 9 2019 lúc 21:45
Bài 1: Tìm x biết: \(\left|x-3\right|+\left|x+2\right|=7\)
Bài 2: CMR: \(\frac{1}{4}+\frac{1}{4^2}+\frac{1}{4^3}+...+\frac{1}{4^{999}}+\frac{1}{4^{1000}}< \frac{1}{3}\)
Bài 3: Tìm x biết:
a) \(x\left(x-2\right)\left(x-3\right)>0\)
b) \(x\left(x-2\right)\left(x-3\right)< 0\)
\(\left(\frac{2}{3}x-1\right).\left(\frac{3}{4}x+\frac{1}{2}\right)=0\)
\(\left(x-1\right)^{^{ }x-2}=\left(x-1\right)^{x+6}\)
a/tìm x biết:
5\(|\frac{3}{4}-\frac{2}{3}x|-3,25=-2\left\{\left(1,25\right)^2-2,5.0,25+\left(0,25\right)^2\right\}\)
b/timd x,y biết:\(\left|3+y\right|+\left|2x+y\right|=0\)
Tìm x,y,z biết
\(\left|x-\frac{1}{2}\right|+\left|y+\frac{2}{3}\right|+\left|x^2+xz\right|=0\)
Bài 1: Tìm x:
a, \(\left(2-3x\right)-\left(5x+8\right)=15x\)
b, \(3\left(x-3\right)-2\left(8-x\right)=6\)
c, \(\frac{7-x}{2}-\frac{2x-3}{4}=\frac{x+2}{8}=\frac{-1}{2}\)
d, \(x^2.\left(-4x\right)+3=0\)
GIÚP MIK NHA!!!!!
Bài 1:Tính
a)\(0,\left(3\right)+3\frac{1}{3}+0,\left(31\right)\)
b)\(\frac{4}{9}+1,2\left(31\right)-0,\left(13\right)\)
Bài 2:Tìm x biết
\(0,\left(37\right)\times x=1\)