xy=ex y所确定的隐函数求导-搜答案-拍题作业网

方程两边求关x的导数ddx(xy)＝(y+xdydx)； ddxex+y＝ex+y(1+dydx)；所以有（y+xdy

这种题可以直接全微分,即e^xdx+xdy+ydx=0所以dy/dx=(e^x+y)/-x

隐函数求导,两边同时求导,此题是对X求导!两边同时求导：y+xy'=e^x-y'y'=(e^x-y)/(x+1)由XY=e^X-y解出yy=e^x/x+1,带入上式y'=(e^x-y)/(x+1)=[

方程两边对x求导：e^y×y'＝y＋xy'得y'＝y/(e^y－x)

y^2-2xy+9=0两边分别对x求导数得：2y(dy/dx)-2y-2x(dy/dx)=0(dy/dx)(y-x)-y=0dy/dx=y/(y-x)

已知：x^(y²)+y²lnx=4即：e^[lnx^(y²)]+y²lnx=4即：e^[y²×lnx]+y²lnx=4两边求导得到：e^[(

∵dudx=∂f∂x+∂f∂y•dydx+∂f∂z•dzdx…（1）由exy-xy=2，两边对x求导得：exy(y+xdydx)-(y+xdydx)=0解得：dydx=-yx．又由ex=∫x-z0si

先移项：e=e^y+xy,再两边对x求导：0=e^y*y'+y+x*y',解得：dy/dx=y'=-y/（e^y+x）

y'=(y+xy')/(xy)xyy'-xy'=yy'=y/(xy-x)所以dy/dx=y'=y/(xy-x)

两边求导：e^(xy)*(xy)'-(xy)'=0e^(xy)*(y+xy')-(y+xy')=0ye^(xy)+xe^(xy)*y'=y+xy'x(e^(xy)-1)y'=y(1-e^(xy))y'

y+xy'+y'/y=0//对xy和lny分别求导,注意y是x的函数y'(x+1/y)=-y//移项,合并同类项y'=-y²/(xy+1)

xy+lny=1两边求导y+xy'+y'/y=0y'=-y/(x+1/y)=-y^2/(xy+1)

两边求导：y+xy'+y‘/y=0将x=0带入得到：y'=--y^2

-e^2

两边分别求x的导数得：e^x+(y+xy')=0,即y'=-(e^x+y)/x,即：dy/dx=-(e^x+y)/x

y+x*y'=e^(x+y)*(1+y')∴dy/dx=[e^(x+y)-y]/[x-e^(x+y)].

cos(xy)=x-y,隐函数,两边求导-sin(xy)*(xy)'=1-y'-sin(xy)*(y+xy')=1-y'-ysin(xy)-xcos(xy)*y'=1-y'y'[1-xsin(xy)]

第一步方程两边对x求导记y+xy'-y'/y=2x第二步解出y'记y'=(2xy-y^2)/(xy-1)

e^xy(y+xy')=2+6yy'y'=(ye^xy-2)/(6y-xe^xy)dy=dx(ye^xy-2)/(6y-xe^xy)

e^(x+y)=xy两边对x求导：e^(x+y)*(1+y')=y+xy'解得：y'=[y-e^(x+y)]/(e^(x+y)-x]=(y-xy)/(xy-x)