设f(x,y,z)=x2一y2+2z2,则div(gradf)=_________.

admin2018-05-23  34

问题 设f(x,y,z)=x2一y2+2z2,则div(gradf)=_________.

选项

答案4

解析 gradf=={2x,一2y,4z},
则div(gradf)==4.
转载请注明原文地址:https://kaotiyun.com/show/lbg4777K
0

最新回复(0)