X~U(0,1),Y=-2lnX-搜答案-搜搜做题作业网

y'=f'(ln(x+√(a+x²)))·ln(x+√(a+x²))‘=f'(ln(x+√(a+x²)))·1/(x+√(a+x²))·(x+√(a+x

y=ln(1+x^2),求y

y'=[1/(1+x^2)]*(1+x^2)'=[1/(1+x^2)]*2x=2x/(1+x^2)

求导y=ln ln ln(x^2+1)

y=ln(1-x^2)

chainruley=f(g(x))y'=g'(x)f'(g(x))

y=ln[ln(ln x)] 求导

复合函数f(x)=lnxg(x)=ln[ln(x)]r(x)=ln{lnln(x)]}r'(x)=[1/lnln(x)]g'(x)=[1/lnln(x)][1/ln(x)]f'(x)=[1/lnln(

y=arctan(a/x)+1/2[ln(x-a)-ln(x+a)],利用复合函数求导的链锁规则,有y'=1/(1+(a/x)^2)*(-a/x^2)+1/2[1/(x-a)]-1/(x+a)]=-a

y=ln^2(1-x)求导

Y=[LN(1-X)]^2?Y'=2LN|1-X|/(1-X)(-1)=-2LN|1-X|/(1-X)

由柯西-黎曼条件：对u(x,y)=1/2ln(x^2+y^2)求x的偏导x/(x^2+y^2),对u(x,y)=1/2ln(x^2+y^2)求x的偏导y/(x^2+y^2),f'(z)=x/(x^2+

y=ln(1-x^2) 求y''

y=ln(1-x^2)y'=(1-x^2)'/(1-x^2)=-2x/(1-x^2)

这是复合函数求导,把u^2-1看做整体,设u^2-1=y,则lny的导数为（1/y）*dy,在对u^2-1=y求导则dy=(2u)du,所以dx={2u/(u^2-1)}du

左边对u积分,右边对x积分∫du/(u^2-1)^(1/2)=ln[u+(u^2-1)^(1/2)]+C1∫dx/x=lnx+C2所以ln[u+(u^2-1)^(1/2)]=lnx+C题目是不是写错了

ux=2x/(x^2+y^2+z^2)uy=2y/(x^2+y^2+z^2)uz=2z/(x^2+y^2+z^2)故du=uxdx+uydy+uzdz=2x/(x^2+y^2+z^2)dx+2y/(x

Fy(Y)=P(Ye^(-y))=1-P(x=0)

y=ln(1+x^2)求导

2x/(1+x^2)

y=ln(2x^-1)求导

y'=ln(2x^-1)'=(x/2)*2*(-1)/x^2=-1/x

y=ln(x+√x^2+1),求y

x≤0时√x^2=-x所以y=0x>0时√x^2=x所以y=ln（2x+1）

Y=-2ln(X)在X~(0,1)上是相互一对一的函数关系所以可以使用密度函数乘上导数的方法fy(y)=fx(x(y))*|dx/dy|=1|dx/dy|Y=-2ln(X)lnX=-0.5YX=e^(

u'x=2x/(x^2+y^2+z^2)u'y=2y/(x^2+y^2+z^2)u'z=2z/(x^2+y^2+z^2)du=2xdx/(x^2+y^2+z^2)+2ydy/(x^2+y^2+z^2)

对等式两边求全微分du=【1/(2x+3y+4z^2)】【2dx+3dy+8zdz】