<p>设曲线方程为<img src="https://file.gaojiufeng.cn/learnAppQuestion/3b/6d/3b6d570249eb9dc9769411c50e27efb5.jpg" style="width: 100%;height: auto;">求<img src="https://file.gaojiufeng.cn/learnAppQuestion/c4/56/c456d9b77422bf75679a33287b3d6c79.jpg" style="width: 100%;height: auto;">以及曲线在点<img src="https://file.gaojiufeng.cn/learnAppQuestion/27/a5/27a58cbc9861a2f7ce357961c2faf472.jpg" style="width: 100%;height: auto;">处的法线方程。</p>