Question

\(\dfrac{x}{3}=\dfrac{1}{x}\)

Answer 1

\(\dfrac{x}{3}=\dfrac{1}{x}\)

\(\Leftrightarrow x^2=3\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\sqrt{3}\\x=-\sqrt{3}\end{matrix}\right.\)

Answer 2

\(\dfrac{x}{3}=\dfrac{1}{x}\left(đk:x\ne0\right)\)

\(\Leftrightarrow x^2=3\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\sqrt{3}\\x=-\sqrt{3}\end{matrix}\right.\)