Chung minh rang khong co so huu ti x nao thoa man :x^2=2
bieu dien so huu ti 5/-4 tren truc so
Tim cac so huu ti a va b biet rang hieu a-b bang thuong a:b va bang hai lan tong a+b
bieu dien so huu ti 4/3 tren truc so
tim cap so x,y biet:
\(\dfrac{1+3.y}{12}\)\(=\dfrac{1+5.y}{5.x}\)\(=\dfrac{1+7.y}{4.x}\)
chung minh co vo so cap so huu ti duong co tong bang tich
Tim x,y va z biet
\(\dfrac{x}{3}=\dfrac{y}{4}=\dfrac{z}{5}\)va \(2x+3y+5z=86\)
Tim x va y
\(\dfrac{x}{4}=\dfrac{y}{5}\)va \(x+y=180\)
tìm x;y
b \(\left|x-y\right|+\left|y+\dfrac{9}{25}=0\right|\)
c \(\left(\dfrac{1}{2}x-5\right)^{20}+\left(y^2-\dfrac{1}{4}\right)^{10}=0\)
a \(\left|\dfrac{1}{2}-\dfrac{1}{3}+x\right|=\dfrac{-1}{4}-y\)
d \(\left|x\left(x^2-\dfrac{5}{4}\right)\right|=x\) \(\left(x\ge0\right)\)
e \(x^2+\left(y-\dfrac{1}{10}\right)^4=0\)
