f(x,y)=ln(x∧2 y∧2),则fxy(1,1)=
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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
y'=(lnlnx)'/lnlnx=(lnx)'/lnxlnlnx=1/xlnxlnlnx
解方程x2-|x-1|-1=0
y=ln[f(x)]y'=f'(x)/f(x)y''={f''(x)f(x)-[f'(x)]^2}/[f(x)]^2
y'=f'(ln(x+√(a+x²)))·ln(x+√(a+x²))‘=f'(ln(x+√(a+x²)))·1/(x+√(a+x²))·(x+√(a+x
chainruley=f(g(x))y'=g'(x)f'(g(x))
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(
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))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)-
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(1-X)]^2?Y'=2LN|1-X|/(1-X)(-1)=-2LN|1-X|/(1-X)
由y=ln(2-x)定义域:2-x>0,∴x<2,值域:y∈R.
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)
2x/(1+x^2)
如果是求导数的话,y'=(2x+e^x)/(x^2+e^x)
x≤0时√x^2=-x所以y=0x>0时√x^2=x所以y=ln(2x+1)
∵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)]=-