问题标题:
【100分求一道数学题,Findanequationforthetangentlinetothecurvex^2y+xy^3=2atthepoint(1;1).】
问题描述:

100分求一道数学题,

Findanequationforthetangentlinetothecurvex^2y+xy^3=2atthepoint(1;1).

季鲁慧回答:
  题目意思是,求曲线x^2y+xy^3=2在点(1,1)处的切线方程.对方程两边取全导,d(x^2y)+d(xy^3)=2,2xydx+x^2dy+y^3dx+3xy^2dy=0,整理得dy/dx=-(2xy+y^3)/(x^2+3xy^2)那么曲线在(1,1)处的斜率为y'=-(2+1)/(1+3)=-3/4,...
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