![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
[主观题]
(1)研究在点(0,0)是否存在偏导数fx(0,0)及fy(0,0);(2)设函数f(x,y)=|x-y|g(x,y),其中
(1)研究在点(0,0)是否存在偏导数fx(0,0)及fy(0,0);(2)设函数f(x,y)=|x-y|g(x,y),其中
(1)研究在点(0,0)是否存在偏导数fx(0,0)及fy(0,0);
(2)设函数f(x,y)=|x-y|g(x,y),其中函数g(x,y)在点(0,0)的某邻域内连续.试问g(0,0)为何值时,f在点(0,0)的两个偏导数均存在?g(0,0)为何值时,f在点(0,0)处可微?
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)