\(\dfrac{x}{3}=\dfrac{1}{x}\)
\(\Leftrightarrow x^2=3\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\sqrt{3}\\x=-\sqrt{3}\end{matrix}\right.\)
\(\dfrac{x}{3}=\dfrac{1}{x}\left(đk:x\ne0\right)\)
\(\Leftrightarrow x^2=3\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\sqrt{3}\\x=-\sqrt{3}\end{matrix}\right.\)