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设z=x2+y2+xy,则=( )。A 2x+2y+x B 2x+2y+y
设z=x2+y2+xy,则=( )。A 2x+2y+x B 2x+2y+y
练习题库
2022-08-02
34
问题
设z=x2+y2+xy,则
=( )。A 2x+2y+xB 2x+2y+yC 2x+x+yD 2x+y
选项
A 2x+2y+x
B 2x+2y+y
C 2x+x+y
D 2x+y
答案
D
解析
对x求偏导数,将y看作常数,有
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本试题收录于:
基础知识水利水电题库水利水电土木工程师分类
基础知识水利水电
水利水电土木工程师
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