Ta có :
\(x=6,\left(622377\right);y=10,\left(406593\right);z=12,\left(298701\right)\)
Ta có :
\(x=6,\left(622377\right);y=10,\left(406593\right);z=12,\left(298701\right)\)
tim: x,y,z biet: x/7 = y/11 = z/13 = 0,(946053)
[ma (946053) la chu ki do nha]
tim x,y,z biet
\(\frac{x}{7}\)+\(\frac{y}{11}\)+\(\frac{z}{13}\)=0(946053)
Tìm các số nguyên dương x,y,z thỏa mãn: \(\frac{x}{7}+\frac{y}{11}+\frac{z}{13}=\frac{946053}{999999}\)
Điền tiếp vào chỗ ... trong bài giải sau:
Bài toán: Tìm \(x,y,z\)nguyên dương biết \(\frac{x}{7}+\frac{y}{11}+\frac{z}{13}=0,\left(946053\right)\)
Bài giải: Ta có: \(0,\left(946053\right)=\frac{946053}{999999}=\frac{947}{1001}\)
\(\Rightarrow\frac{11\cdot13x+13\cdot7y+7\cdot11z}{7\cdot11\cdot13}=\frac{947}{7\cdot11\cdot13}\)
\(\Rightarrow11\cdot13x+13\cdot7y+7\cdot11z=947\)
\(\Rightarrow143x+91y+77z=947\)
\(...\)
Vậy \(\hept{\begin{cases}x=3\\y=4\\z=2\end{cases}}\)
1) A= \(\frac{\frac{3}{4}-\frac{3}{11}+\frac{3}{13}}{\frac{5}{7}-\frac{5}{11}+\frac{5}{13}}+\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}}{\frac{5}{4}-\frac{5}{6}+\frac{5}{8}}\)
b) Cho 3 so x,y,z la 3 so khac 0 thoa man dieu kien :
\(\frac{y+z-x}{x}=\frac{z+x-y}{y}=\frac{x+y-z}{z}\)
Hay tinh gia tri bieu thuc:\(B=\left(1+\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\left(1+\frac{z}{x}\right)\)
Tim x,y,z biet \(\frac{12x-15y}{7}=\frac{20z-12x}{9}=\frac{15y-20z}{11}\) va x+y+z=48
tìm các số x,y,z thuộc N* biết
x/7 + y/11 + z/13 = 0,(946053)
tim x,y,z biet : \(\frac{x-y}{10}\)=\(\frac{y+z}{5}\):\(\frac{x+y}{7}\)=\(\frac{y-z}{-8}\)va x-2y+z=72
TIM X, Y ,Z , BIET :\(\frac{x-2}{6}=\frac{y+3}{9}=\frac{z-7}{10}\)va \(x+y+z=106\)