x三次方的微分-搜答案-智慧作业帮

4^3=6476^(1/3)=(64+12)^3=4(1+3/16)^(1/3)设f(x)=x^(1/3)f'(x)=(1/3)/x^(2/3)f(76)=f(64+12)=f(64)+△y≈4+dy

X³+Y³=(X+Y)(X²-XY+Y²)

原式=(8x^6-6x^6-12x^5)÷(-2x²)=(2x^6-12x^5)÷(-2x²)=-x^4+6x³再问：=(2x^6-12x^5)÷(-2x²)=

1.(-2x²)³-(-x³)²=-8x^6-x^6=-9x^62（-x）^8×（y^6）^(1/2)（x⁴×y⁴）²×y&#

不含x的三次方项则k-1=0k=1

解；z(x)=2x+2y²z(y)=4xy+12y²dz=(2x+2y²)dx+(4xy+12y²)dy

微分：dy=0.16

y=(cosx+sinx+x^3)^(1/x)lny=ln(cosx+sinx+x^3)/x利用罗比塔法则：lim[x-->+∞]lny=lim[x-->+∞]ln(cosx+sinx+x^3)/x=

=xy(4x²+4xy+y²)=xy(2x+y)²

(x-n)*(x^2+x*n+n^2)

x+y的三次方*x+y的二次方=(x+y)^3(x+y)^2=(x+y)^(3+2)=(x+y)^5

x的三次方+8y三次方=(x+2y)(x平方-2xy+4y平方）

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

x^3＋x^3＝2x^3x^3－x^3＝0a^2•（－a^4）＝－a^6－a^2•（－a^4）＝a^6－x•x^2＝－x^3(－x)^2•x^3＝x^5

请说明x的趋向!

x^3+3x^2+3x+1

x^3+x-y^3-y=(x^3-y^3)+(x-y)=(x-y)(x^2+xy+y^2)+(x-y)=(x-y)(x^2+xy+y^2+1).x^3-x^2-y^3+y^2=(x^3-y^3)-(x

您好：x的三次方(y-x)的三次方-(x-y)的三次方=x的三次方(y-x)的三次方+(y-x)的三次方=（x³+1）(y-x)³=（x+1）（x²-x+1）(y-x)&

解-(-x²)³×(-x²)²-x×(-x³)³——是这个吗=x^6×x^4-x×(-x^9)=x^10+x^10=2x^10

17x的9次方,上式为2x的9次方-64x的9次方+81x的9次方