y=ln(1 x^2)则y(5)(0)=-搜答案-智慧作业帮

再问：再问：帮帮忙

设y=ln ln ln x,求y’

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

分子有理化,分子分母同乘以-x-√(x²-a²)结果是2lna-ln(-x-√(x²-a²))

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=ln(1＋x)y'=1/(1＋x)y''=－1/(1＋x)²熟记求导公式

设y=ln(1+x^2)则dy=

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(1-x^2) 求y''

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

求导得y'=1-2x/(x^2+1)=(x-1)^2/(x^2+1),可以看出y有唯一的导数为0的点,即x=1.我们知道y的定义域为全体实数,从而它的极值点必然是导数为0的点,即x=1这一点.另一方面

y=ln(1+2x) 则dy=

2/(1+2x)dx

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(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）

∵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)]=-

y=ln(2x+5),则dy=

y=ln(2x+5),则dy=2/(2x+5)dx