设f(x,y)=x<sup>2</sup>y<sup>2</sup>-2y,

设f(x,y)=x<sup>2</sup>y<sup>2</sup>-2y,<img src='https://img2.soutiyun.com/ask/2021-01-26/980508854051598.png' />

时间:2023-08-03 09:39:45

相似题目