x^2-xy y^2=3求导-搜答案-大师作文网

原式=[x-y(x-y)2-y(x+y)(x+y)(x-y)]•xyy-1=（1x-y-yx-y）•xyy-1=1-yx-y•xyy-1=-xyx-y．故答案是：-xyx-y．

将xy提取公因式变成：xy（x+y）=-3*6=-18

y=x^(3/2)-3x^(1/2)+3x^(-1/2)求导：(3/2)x^(1/2)-(3/2)x^(-1/2)-(3/2)x^(-3/2)

解1）答案e^(4xsin2x)*(4sin2x+8xcos2x)2)答案[(4lny)-(3lnx)-3-(y/x)]/[(3lnx)-(4x/y)+(2lny)+2]3)答案(3y^2-2xy)/

x^3+2x^2+x=10^y3x^2+4x+1=10^y*y'*ln10y'=(3x^2+4x+1)/(10^y*ln10)=(3x^2+4x+1)/[(x^3+2x^2+x)*ln10]

等式两边取对数有：lny=1/3ln[x*(x^2+1)/(x-1)^2]化简得3lny=lnx+ln(x^2+1)-2ln|x-1|两边求导3y'/y=1/x+2x/(x^2+1)-2/(x-1)y

y=(3x+2)/(2x+3),求导

y`=[3(2x+3)-2(3x+2)]/(2x+3)²=5/(2x+3)²

f(x)=(x-1)(x-2)(x-3)f'(x)=(x-2)(x-3)+(x-1)(x-3)+(x-1)(x-2)=x^2-5x+6+x^2-4x+3+x^2-3x+2=3x^2-12x+11

原式=[(x+y)2(x-y)(x+y)+-4xy(x-y)(x+y)]×(x+3y)(x-3y)(x+3y)(x-y)=x-3yx+y，由已知得（3x-2y）（x+y）=0，因为x+y≠0，所以3x

f(x)=x^2x 求导

y=f(x)=x^2xlny=2xlnx对x求导(1/y)*y'=2*lnx+2x*1/x=2lnx+2所以y'=y*(2lnx+2)所以f'(x)=x^2x(2lnx+2)

y=3^-x*x^2,求导

Iny=(-x)In3+2Inx(Iny)‘=-In3+2/xy'/y=-In3+2/xy'=(-In3+2/x)yy'=(-In3+2/x)[3^(-x)·(x²)]=(-x²I

y=2^(3x-2)求导

3*2^(3x-2)*ln2写点过程好了,先对2^n求导=2^n*ln2,然后3x求导为3所以2^(3x-2)求导为3*2^（3x-2)*ln2注意!x^n的导数为n*x^(n-1),2^n求导并不等

求导y=(3x+2)^4

y=(3x+2)^4shez=3x+2suoyiy=z^4y'=(z^4)'*(3x+2)'=4z^3*3=12(3x+2)^3

求导 y=(-2x+3)sinx

y=-2xsinx+3sinxy'=-2sinx-2xcosx+3cosx

y=(2-x^2)^3求导

y'=3(2-x²)²×(2-x²)'=3(2-x²)²×(-2x)=-6x(2-x²)²

y=x^2求导

=2x

因为y是由x表示的函数,由于没有具体的表达式,所以求导的时候用y'表示已经对y求导了(xy^2)'=y^2+x(y^2)'=y^2+2xy(y)'=y^2+2xyy'

f(x)=x^3-4x^2求导数

f'(x)=3x^2-8x再问：具体一点再答：公式(x^n)'=n*x^(n-1)所以x^3n=3(x^3)'=3x^2同理x^2=2x所以f'(x)=3x^2-8x

y=e^3x^2求导

6x*exp(3x^2)exp()相当于e^()

y=(3x+5)^2求导

解;y=(3x+5)²则y'=2(3x+5)×(3x+5)'=2(3x+5)×3=6(3x+5)=18x+30y=f(ax+b)的求导公式,y'=f'(ax+b)*(ax+b)'=af'(a