若函数z=ln(xy)/y,则当x=e,y=e-1时,全微分dz等于( )。A. edx + dy B. e2dx-dy C. dx + e2dy ...

作者: tihaiku 人气: - 评论: 0
问题 若函数z=ln(xy)/y,则当x=e,y=e-1时,全微分dz等于( )。
选项 A. edx + dy B. e2dx-dy C. dx + e2dy D. edx+e2dy
答案 C
解析 正确答案是C。

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