设z=f(u,v)具有一阶连续偏导数,其中u=xy,v=x2+y2,A.xfu'+yfv' B. xfu'+2yfv'C.yfu'+2xfv...

作者: rantiku 人气: - 评论: 0
问题 设z=f(u,v)具有一阶连续偏导数,其中u=xy,v=x2+y2, A.xfu'+yfv' B. xfu'+2yfv'C.yfu'+2xfv' D.2xfu'+2yfv'
选项
答案 C
解析 提示:利用复合函数偏导数公式计算。

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