来自邱渡裕的问题
求导数或微分1.y=sinx-cosx,求y'|x=π/62.y平方-2xy+9=0,求dy/dx3.y=xsin2x,求dy
求导数或微分
1.y=sinx-cosx,求y'|x=π/6
2.y平方-2xy+9=0,求dy/dx
3.y=xsin2x,求dy
1回答
2020-05-22 19:23
求导数或微分1.y=sinx-cosx,求y'|x=π/62.y平方-2xy+9=0,求dy/dx3.y=xsin2x,求dy
求导数或微分
1.y=sinx-cosx,求y'|x=π/6
2.y平方-2xy+9=0,求dy/dx
3.y=xsin2x,求dy
1.y=sinx-cosx,求y'|x=π/6
y'=cosx+sinx
y'|x=π/6=(√3)/2+1/2
2.y^2-2xy+9=0,求dy/dx
直接对方程求关于x的导数:2y*y'-2(y+xy')=0
整理,得y'=y/(y-x)
3.y=xsin2x,求dy
y'=sin2x+2xcos2x
dy=y'dx=(sin2x+2xcos2x)dx