函数Y=2的X方-X的平方
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y=2x^3-3x^2y'=6x^2-6x=6x(x-1)x<0,或x>1时单调增,0<x<1时单调减极大值f(0)=0-0=0极小值f(1)=2-3=-1
展开后分离y=(x^4+x^2+5)/(x^4+x^2+1)=1+4/(x^4+x^2+1)换元令t=x^2则y=1+4/(t^2+t+1)(t∈R)则值域:(0,19/3】再问:我做到了您说的最后一
令2x平方加3x三次方加1为t,则y=cos三次方t令cost为a,则y=a的三次方.所以导数为3cos平方(2x平方加3x三次方加1)*{-sin(2x平方加3x三次方加1)}*(4x+9x的平方)
原式=(4x的3次方+2x的4次方y)÷x的2次方=(4x的3次方÷x的2次方)+(2x的4次方y÷x的2次方)=4x+2x的2次方y=4x+2x²y
(1)y'=4*x^3(2)y'=6x/(x^2+5)-(6x^3-4x)/(x^2+5)^2(3)y'=4x+5/2*x^(3/2)(4)y'=4x^3+2x-1/2*x^(-3/2)(5)y'=c
1.y=根号(1-x^2)y'=(1/2)(1-x^2)^(-1/2)(-2x)=(-x)[(1-x^2)^(-1/2)]2.y=(lnx)^3y'=(3[(lnx)^2])/x再问:第二步写出过程好
y'=6x^2+6x-12>0x>1或x
y=(x^2+1/2)^2+3/4x^2=0y=1
y'=4x³+6x²+12x+5=04x³+2x²+4x²+12x+5=02x²(2x+1)+(2x+5)(2x+1)=0(2x²
y'=6x^2-6x=0x=0,x=1x
原式=a²(x-y)²+2a(x-y)³+(x-y)^4=(x-y)²[a²+2a(x-y)+(x-y)²]=(x-y)²[a+(
(243b)/(512a)y的平方(64a方xy)/6251.5(x-y)的四次方(ps.还用再解么?)…………不对哟,那个-3/4a的六次方是指:1.-3/4a整体的六次方2.-3/4乘以a的六次方
x-y=2两边同时平方又x^2+y^2=12所以xy=4原式=xy(x^2-2xy+y^2)=xy(x-y)^2=16
∂z/∂x=6x²y^4+12xy^3∂z/∂y=8x^3y^3+18x²y²那么再求二阶偏导数,得到∂
直接将二式相乘,得(x²+ax+b)(3x+1)=3x³+x²+3ax²+ax+3bx+b=3x³+(1+3a)x²+(a+3b)x+b由于
x的四次方-3x的平方y的平方+2y的四次方=(x²)²-3x²y²+2(y²)²=(x²-y²)(x²-2y
x/(x+y)(x--)^3=x/(x+y)(x--y)^3y/(y+x)(y--x)^2=y(x--y)/(x+y)(x--y)^3.
x²+2xy+y²+x⁴-y⁴=(x+y)²+(x²+y²)(x²-y²)=(x+y)²+(x&
等于﹣2x的平方y(1+y的平方)再问:能不能把过程也写出来!!!再答:x^2y-2x^2y^3-3x^2y=-2x^2y-2x^2y^3=-2x^2y(1+y^2)