作业帮|x 2| (y-1 2)立方
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 04:00:22
（xy)^2-y(2xy)=x^2y^2-2xy^2=xy^2(x-2)
16x-y=2x^2+y^2=12x^3y-2x^2y^2+xy^3=xy(x^2+y^2-2xy)=xy(x-y)^2x-y=2==>(x-y)^2=4==>x^2+y^2-2xy=4又因为x^2+
∵（x-x2）+（x2-y）=1，∴x-y=1．∵12（x2+y2）-xy=12（x2+y2-2xy+2xy）-xy=12（x2+y2-2xy）+xy-xy=12（x-y）2，把x-y=1代入上式，得
∵lim(x→0-)[x^(2/3)]=lim(x→0+)[x^(2/3)]=0^(2/3)=0=y(0)∴y==3√x^2=x^(2/3)在x=0处连续∵lim(x→0)[x^(2/3)-0]/(x
(X^2-y+1)(X^2+1)+X^2y+y-X^2=(X^2-y+1)(X^2+1)+(X^2+1)y-X^2=(X^2-y+y+1)(X^2+1)-X^2=(X^2+1)^2-x^2=(x^2+
求垂直于直线2x-6y+1=0说明被求直线斜率为-3对曲线y=x3+3x2-5求导y'=3x^2+6x=-3可解得x=-1,y=-3所以直线方程为y+3=-3(x+1)即y=-3x-6
0-36-1/36-18-1/1812-1/4
对y进行求导得:3x^2+2x
3x³－12x²y＋12xy²=3x﹙x²－4xy＋4y²﹚=3x﹙x－2y﹚²
=-3xy(x²-2xy+4y²)
(x+y+z)³-x³-y³-z³=（y+z)[(x+y+z)²+x(x+y+z)+x²]-(y+z)(y²-yz+z²
条件变换：(x-3)^2+(y+1)^2=0即：y+1=0x-3=0所以：立方根号x2-y2=2
原式=（4x2-y2+x2+2xy+y2-4x2+2xy）÷（-4x）=（x2+4xy）÷（-4x）=-14x-y，∵2y+x2=10，∴y=5-x4，则原式=-14x-5+14x=-5．
x^2y-xy^2+x^3-y^3=x^2y-y^3+x^3-xy^2=y(x^2-y^2)+x(x^2-y^2)=(x+y)(x^2-y^2)=(x+y)^2(x-y)不懂还可以问(⊙o⊙)哦再问：
煤高位发热量29300kj/kg,你可以去网上找个计算水蒸气焓值的软件,把你给水的初始条件和蒸汽的末条件减一下,看需要多少热量,然后除一下就知道了.
原式=x2-2x2+4y+2x2-2y=x2+2y，当x=-1，y=12时，原式=（-1）2+2×12=2．
4x^2+y^2-4x-6y+10=0(4x^2-4x+1)+(y^2-6y+9)=0(2x-1)^2+(y-3)^2=0所以,x=1/2,y=3(2/3x√9x+y2√x/y3)-(x2√1/x-5
/>1,y'=x'lnx+x(lnx)'-x'=lnx+1-1=lnx2,隐函数求导x³-y³-x-y+xy=2两边同时对x求导得3x²-3y²y'-1-y'+
a^3+2^3=(a+2)(a^2-2a+4)(3a)^3-1=(3a-1)(9a^2+3a+1)