设z=ln(x+ey),则∂2z/∂x∂y=()
A.ex/(ex+ey)2
B.-ex+y/(ex+ey)2
C.ex+y/(ex+ey)2
D.ey/(ex+ey)2
正确答案是B
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/54585.html
上一篇:资金成本有什么作用?
下一篇:Insects are also interesting. First, they are very 76 ____animals. Three hundred and twenty million years ago, when no men or other 77 ____lived in the world, there were insects. Today, in every square mile of land there are millions of them flying a