偏导数表示曲面被平面所截得的曲线在点 处的切线对轴的斜率。( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/1a6c85495a6b43a2b96a41f824fa8017.png
举一反三
- 偏导数表示曲面被平面所截得的曲线在点处的切线对轴的斜率。()
- 曲线在点处的切线的斜率等于该点横坐标的平方,则曲线所满足的微分方程为。( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/0ba05d14c918497783390923afe6d362.png
- 函数在点处是连续的且偏导数也是存在的。( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/66eeff13d1904738bea6f4255ed45e69.png
- 空间曲线,在点处的法平面必( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/bfc647dd12e84c118c466425a1312203.png
- 设有连续的偏导数,且,则 =( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/63eb2ad0bac447489cbf8cbb923d3692.png