begin{arraylx=5+ty=3tendarray.

常见问题解答

• 写出矩形方程 $\{\begin{array}{l}x=5+t\\ y=3t\end{array}$

  

  $$y=3\left(x-5\right)$$

• 求参数导数 $\{\begin{array}{l}x=5+t\\ y=3t\end{array}$

  

  $$\frac{dy}{dx}=3$$