求微分运算y^2 3xy-2x=0 dy-搜答案-拍题作业网

我来试试吧...z=e^xy*cos(x+y)Z'x=ye^xycos(x+y)-e^xysin(x+y)Z'y=xe^xycos(x+y)-e^xysin(x+y)故dZ=[ye^xycos(x+y

隐函数求导设z=x²y²-cos(xy)dy/dx=-(δz/δx)/(δz/δy)=-(2xy²+ysin(xy))/(2x²y+xsin(xy))=-y/x

-sin(xy)[ydx+xdy]=2xy^2*dx+x^2*2ydy-sin(xy)ydx-sin(xy)xdy=2xy^2*dx+2x^2*ydy-2x^2*ydy-sin(xy)xdy=2xy^

方程两边对x求导,得：y+xy'+y'e^y=2y+2xy'y'e^y-xy'=y得y'=y/(e^y-x)因此dy=ydx/(e^y-x)

2xdx+ydx+xdy+2ydy=0(x+2y)dy=-(2x+y)dxdy=-(2x+y)/(x+2y)×dx

[2@(-3)]@(-4)=[2-(-3)/2*(-3)]@(-4)=[5/(-6)]@(-4)={(-5/6)-(-4)}/{(-5/6)*(-4)=(19/6)/(20/6)=(19/6)*(6/

令u=2x^2-y^2,v=xy然后链导法则!再问：请您把详细过程给我好吗？再答：偏导数符号打不上去啊du=(4xfu+yfv)dx+(-2yfu+xfv)dy其中fu、fv是偏导数符号

求x=y^y的微分

如果对x求导,则ln|x|=yln|y|,1/x=y'/y+yy'/y=y'/y+y',.对数求导法.如果对y求导,则ln|x|=yln|y|,x'/x=ln|y|+y/y,x'=y^y(1+ln|y

y'+xy=x^3求微分

y'+xy=0的通解y.=Ce^(-x).特解y=x^2-2x.通解y=Ce^(-x)+x^2-2x.再问：不好意思啊，之前一直在忙别的。没有及时回复，首先谢谢你的回答。但是我觉得你的回答有点问题。‘

∵x²dy+(y-2xy)dx=0==>x²dy/dx+(1-2x)y=0==>dy/y+(1/x²-2/x)dx=0==>ln|y|-1/x-2ln|x|=ln|C|(

dy/dx=3xy=xy^2dy/(3y+y^2)=xdx1/3*ln(y/3+y)=1/2*x^2+c1ln(y/3+y)=3/2*x^2+c2(c2=3c1)y/3+y=e^(3/2*x^2+c2

两边即对数得：lnz=xy*ln(lnu),不妨记u=x^2+y^2z'x/z=yln(lnu)+2x^2y/lnu,z'x=z[yln(lnu)+2x^2y/lnu]z'y/z=xln(lnu)+2

隐函数求导的问题,由F(x,y)=0确定隐函数y=y(x),对方程两边求导时,其中含y的式子要始终注意y是一个x的函数,如(siny)'=cosy*y',(e^siny)'=e^siny*(siny)

求二元函数全微分z=f[x²-y²,e^(xy)]设z=f(u,v),u=x²-y²,v=e^(xy)则dz=(∂f/∂u)du+(&#

原式两边微分2ydx+2xdy-2ydy=2dx故dy=(1-y)dx/(x-y)

y'=2e^2xcos(e^2x)把y看成复合函数sint,t=e^m,m=2x.复合函数求导,等于三个分别求导的积

(*^__^*)嘻嘻……自己慢慢想吧!用计算器算呗

1.y=sinx-cosx,求y'|x=π/6y'=cosx+sinxy'|x=π/6=(√3)/2+1/22.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'

dz=(y+1/y)dx+(x-x/y^2)dy