设y=y(x)由方程e^y+xy=e所确定,则dy/dx=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 00:03:33
设y=y(x)由方程e^y+xy=e所确定,则dy/dx=?
x=n@ A&HAE4P P FPD6,{q+dln̼PMBXG'5۫A)S^2}޴8UZoW-w[]m~dևs6 1K^lS6ÕV,v*ovkٽ]bmtEN!z8P)H>3pGB!e.6Oi

设y=y(x)由方程e^y+xy=e所确定,则dy/dx=?
设y=y(x)由方程e^y+xy=e所确定,则dy/dx=?

设y=y(x)由方程e^y+xy=e所确定,则dy/dx=?
为你提供精确解答
e^y+xy=e两边对x求导知:
(e^y)(dy/dx)+y+x(dy/dx)=0
解出:dy/dx=-y/(e^y+x)

e^y+xy=e
两边同时对x求导,得
e^y*y'+y+xy'=0
(e^y+x)y'=-y
所以
y'=-y/(e^y+x)