二阶连续偏导数怎么求啊,跪求大神,要步骤(

2024-11-17 06:06:06
推荐回答(1个)
回答1:

z=x2arctan(y/x)+∫y/(1+y2/x2)dx-xy =x2arctan(y/x)-xy+∫y-y3/(x2+y2)dx =x2arctan(y/x)-y2arctan(x/y)+C