求y=(3x-1)三次方乘(2x-1)五次方的导数-搜答案-大师作文网

/>x与y互为相反数x=-y即x+y=0x^3y+2x^2*y^2+xy^3=xy(x^2+2xy+y^2)=xy(x+y)^2因为x+y=0,xy=-1/4所以x^3y+2x^2*y^2+xy^3=

原式=4x²y³÷(-1/2xy)²=4x²y³÷[(-1/2)²x²y²]=4x²y³÷[(1/4

这个多项式（4x³-3xy-1）*（-2x²y³）=-8x的5次方y³+6x³y的4次方+2x²y³如果本题有什么不明白可以追问,

1、(x+y)乘(x-y)的三次方+(x+y)的三次方乘(y-x)=（x+y)(x-y)((x-y)²-(x+y)²)=（x+y)(x-y)(x-y+x+y)(x-y-x-y)=-

x³y+2x²y²+xy³=xy(x²+2xy+y²)=xy(x+y)²=1×3²=9

由ly-2l+(x-1)的平方=0得y-2=0,x-1=0；则y=2,x=1；x的三次方-x的平方y+x乘y的平方+x的平方y-x乘y的平方-y的三次方=1-8=-7

（x+y）三次方×（2x+2y）三次方×（3x+3y）三次方=(x+y)³×8(x+y)³×27(x+y)³=216((x+y)的9次方

1、2x^4y^3-x^2y=2x(xy)^3-(xy)x=54x-3x=51x已知2x-y=4,xy=3,可求得x值代入即可.

已知x+y=1,则x^3+y^3+3xy=（x+y）(x^2-xy+y^2)+3xy=1×(x^2-xy+y^2)+3xy=x^2-xy+y^2+3xy=x^2+2xy+y^2=(x+y)^2=1^2

Y=X的三次方乘COSXY’=3x^2cosx-x^3sinxY=(2X的二次方减3)(X的二次方减4)Y'=4x*(X的二次方减4)+(2X的二次方减3)*2x

(2x^4)y³－x³y^4=(x³y³)(2x－y)=(xy)³(2x－y)=4³×(1/16)=4

原式=x平方y(x平方+xy+1/4y平方)=x平方y(x+Y/2)平方再开方=x根y成(x+Y/2)=7√2/36

解(1)：x²+y²=(x+y)²-2xy=a²-2b(2)：x³+y³=(x+y)(x²-xy+y²)=(x+y)[(

带入x=2,y=1,最后得出-4

由题可知,x+y+1=0,xy+3=0即得x+y=-1,xy=-3（x+y)²=x²+2xy+y²∴(-1)²=x²+2×（-3）+y²即x

绝对值平方大于等于0所以此题只有0+0=0满足题意|x+2|=0；(y+1)²=0解得x=-2;y=-1-3(x-2y)³-2(2x-y)³=-3(0)³-2(

/>三分之二乘x的3A-1次方乘y的三次方与负的四分之一乘X的五次方乘y的2b+1次方是同类项3a-1=52b+1=3a=2b=15a+2b=5×2+2=12

原式=(x+y)³×[2(x+y)]³×[3(x+y)]³=(1/2)³×1³×(3/2)³=1/8×27/8=27/64