求y=根号x分之a b的微分-搜答案-智慧作业帮

设u=√(y/x)u'x=(-1/2)x^(-3/2)y^(1/2)u'y=(1/2)(xy)^(-1/2)那么原式变成了arctanu=(1/u^2)所以(u^2)arctanu=1两边取全微分得到

dy=e^(x^x)(e^(xlnx))'dx=e^(x^x)*(x^x)*(1+lnx)

x+y=-3x=-y-3xy=2(-y-3)y=2-y²-3y-2=0y²+3y+2=0（y+1）（y+2）=0y1=-1y2=-2一、当y1=-1时,x1=-2,根号y分之x加根

根号内必须大于等于0故有x-1≥0且1-x≥0即x≥1且x≤1所以x=1将x=1代回去得y=3然后将x,y代入所求式即可你的所求式表述不是很清楚,所以没办法帮你求了

dy=arcsinxdx+xdx/根号(1-x^2)+xdx/(根号1-x^2+e^2)

y=x/(1+√x)则y'=[x'*(1+√x)-x*[(1+√x)]']/(1+√x)²=[(1+√x)-x*1/2√x)/(1+√x)²=(2+√x)/(2+4√x+2x)dy

见下图片

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

symsx>>y=log(x+sqrt(1+x^2));>>simple(diff(y)ans=1/(1+x^2)^(1/2)>>y=log(2*x+sqrt(1+x^2));>>simple(dif

y＝ln[x+√(1+x²)]∴y'＝[x+√(1+x²)]'/[x+√(1+x²)]＝[1+x/√(1+x²)]/[x+√(1+x²)]＝[x+√(

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(1)y=(2x^3-3x^2+3)(√x+1/x)=2x^(7/2)-3x^(3/2)+3x^(1/2)+2x^2-3x+3/x,　dy=[7x^(5/2)-(9/2)x^(1/2)+(3/2)x^

y=x/(x²+1)dy/dx=(x²+1-2x²)/(x²+1)²dy=(1-x²)dx/(x^4+2x^2+1)

y=arcsin√(1-x^2)y'=-x/(|x|√(1-x^2))∴dy=-xdx/(|x|√(1-x^2))当x>0dy=-dx/√(1-x^2)当x

z=1/2*ln(x^2+y^2+4)Z'x=1/2*1/(x^2+y^2+4)*(2x)=x/(x^2+y^2+4)Z'y=1/2*1/(x^2+y^2+4)*(2y)=y/(x^2+y^2+4)所

先求出z对x和y的偏导数分别是1/y,-x/y^2所以dz=(1/y)*dx-(x/y^2)*dy

y=x^2(cosx+√x),dy=[2x(cosx+√x)+x²(-sinx+1/2*1/√x)]dx=[2xcosx-x²sinx+2x√x+1/2*x√x]dx=[x(2co

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

y=1/x+√x=x^(-1)+x^(1/2)∴y'=(-1)*x^(-2)+(1/2)*x^(-1/2)=-1/x^2+1/(2√x)

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