Ta có: \(\left\{{}\begin{matrix}\dfrac{x}{2}=\dfrac{y}{3}\\\dfrac{y}{3}=\dfrac{z}{4}\end{matrix}\right.\Rightarrow\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}\)
Áp dụng tính chất dãy tỉ số bằng nhau, ta có:
\(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}=\dfrac{x+y+z}{2+3+4}=\dfrac{46}{9}\)
\(\Rightarrow\left\{{}\begin{matrix}x=\dfrac{2.46}{9}=\dfrac{92}{9}\\y=\dfrac{3.46}{9}=\dfrac{46}{3}\\z=\dfrac{4.46}{9}=\dfrac{184}{9}\end{matrix}\right.\)
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P/s: Đề đúng không nhỉ?
\(\dfrac{x}{2}=\dfrac{y}{3};\dfrac{y}{3}=\dfrac{z}{4}\)\(\Rightarrow\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}\)
Áp dụng tính chất dãy tỉ số bằng nhau , có:
\(\dfrac{x+y+z}{2+3+4}=\dfrac{46}{9}\)
\(\Rightarrow x=\dfrac{2.46}{9}=\dfrac{92}{9}\)
\(\Rightarrow y=\dfrac{3.46}{9}=\dfrac{138}{9}\)
\(\Rightarrow z=\dfrac{4.46}{9}=\dfrac{184}{9}\)
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\(\left\{{}\begin{matrix}\dfrac{x}{2}=\dfrac{y}{3}\\\dfrac{y}{3}=\dfrac{z}{4}\end{matrix}\right.\Leftrightarrow\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}\)
Áp dụng tính chất dãy tỉ số bằng nhau ta có:
\(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}=\dfrac{x+y+z}{2+3+4}=\dfrac{46}{9}\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=\dfrac{46}{9}.2=\dfrac{92}{9}\\y=\dfrac{46}{9}.3=\dfrac{46}{3}\\z=\dfrac{46}{9}.4=184\end{matrix}\right.\)
Ta có:\(\dfrac{x}{2}=\dfrac{y}{3};\dfrac{y}{3}=\dfrac{z}{4}\)và x+y+z=46
Suy ra:\(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}=\dfrac{x+y+z}{2+3+4}=\dfrac{46}{9}\)
Nên \(x=\dfrac{46}{9}.2=\dfrac{92}{9}\)
\(y=\dfrac{46}{9}.3=\dfrac{46}{3}\)
\(z=\dfrac{46}{9}.4=\dfrac{184}{9}\)
Vậy \(x=\dfrac{92}{9};y=\dfrac{46}{3};z=\dfrac{184}{9}\)