f(x,y)=ln(x∧2 y∧2),则fxy(1,1)=

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f(x,y)=ln(x∧2 y∧2),则fxy(1,1)=
高数题求高手!设f(x)=ln{x-(x^2-x^2)^(1/2)},其中x>y>0,则f(x+y,x-y)等于?A.2

选A,首先你先检查一下你的题目,你写错了.后面一个X应该是Y.解法是把x+y和x-y分别代入化简再问:是写错了,应该是y,您能帮忙写一下具体过程吗?谢谢

设y=ln ln ln x,求y’

y'=(lnlnx)'/lnlnx=(lnx)'/lnxlnlnx=1/xlnxlnlnx

求二阶导数,y=ln[f(x)],求y''

y=ln[f(x)]y'=f'(x)/f(x)y''={f''(x)f(x)-[f'(x)]^2}/[f(x)]^2

已知f(u)可导,y=f{ln[x+√(a+x^2)]},求y'

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)

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=ln^2x求导

1/x再问:求写一下过程拍照再答:再问:不是是ln二次方x再答:再答:懂了么再答:再问:懂了再答:别忘了采纳最佳答案

y=ln[f(x)],求y''(1)

y=ln(f(x))y'=f'(x)/f(x)y'*f(x)=f'(x)y''*f(x)+y'*f'(x)=f''(x)y''*f(x)=f''(x)-y'*f'(x)y''*f(x)=f''(x)-

f(x)=ln(2x-1)2x-y+3=0

当曲线上的点的切线与直线平行时距离最短,则有f'(x)=2/(2x-1)=2解得x=1f(1)=ln(2-1)=0所以该点为(1,0)最短距离d=|2+3|/√5=√5选择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)

y=ln(2-x) 值域

由y=ln(2-x)定义域:2-x>0,∴x<2,值域:y∈R.

求导 y=ln(tan(x/2))

y'=1/(tan(x/2))*(tan(x/2))'=1/(tan(x/2))*(sec^2(x/2))*(x/2)'=1/(2sin(x/2)*cos(x/2))=1/sin(x)=csc(x)

y=ln(1+x^2)求导

2x/(1+x^2)

y=ln(x^2+e^x) 求Y'X

如果是求导数的话,y'=(2x+e^x)/(x^2+e^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)

设f(x,y)=ln[x(1+2/y)],则y偏导等于

∵f(x,y)=ln[x(1+2/y)]=lnx+ln(1+2/y)∴αf(x,y)/αy=(-2/y^2)/(1+2/y)=-2/[y(y+2)]即αf(1,1)/αy=-2/[1*(1+2)]=-