lim x²y x三次方 y三次方
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(x-y)七次方÷【(x-y)三次方÷(y-x)】三次方=(x-y)七次方÷【-(x-y)²】三次方=(x-y)七次方÷【-(x-y)六次方】=-(x-y)=y-xm+1+2n-1=5n+2
X³+Y³=(X+Y)(X²-XY+Y²)
(x+y+z)^3-x^3-y^3-z^3=(x+y+z)^3-x^3-(y^3+z^3)=(x+y+z-x)[(x+y+z)^2+x(x+y+z)+x^2]-(y+z)(y^2-yz+z^2)=(y
^表示次方y三次方*y五次方+2y三次方*y四次方*y=y^3*y^5+2y^3*y^4*y=y^(3+5)+2y^(3+4+1)=y^8+2y^8=3y^83y的8次方
原式=(x-y)^4(x-y)(x-y)^3=(x-y)^4(x-y)^4=2(x-y)^4
x^3+y^3+z^3-3xyz=(x+y+z)(x^2+y^2+z^2-xy-yz-zx)=(x+y+z)[(x-y)^2+(y-z)^2+(z-x)^2]/2≥0x^3+y^3+z^3≥3xyz
=xy(4x²+4xy+y²)=xy(2x+y)²
1.为了简化算式,设A=2000的立方根,B=2001的立方根,C=2002的立方根A^3=2000,B^3=2001,C^3=2002A^3x^3=B^3y^3=C^z^3y=Ax/Bz=Ax/C2
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)
a^3+b^3=(a+b)*(a^2-ab+b^2).(a,b分别用X,Y代替吧,这是一个立方和公式)不过我感觉应该是最简了吧,如果用立方和来解开的话,计算步骤有会增多
/>x^3+y^3+z^3-3xyz=x^3+x^2y+x^2z+y^2x+y^3+y^2z+z^2x+z^2y+z^3-x^2y-y^2x-xyz-xyz-y^2z-yz^2-x^2z-xyz-z^
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)&
y的三次方
X³y²-2/5x²y+3x³y²-1/2yx²-ax³y²=(4-a)X³y²-2/5x²
根号9X三次方Y方(X+Y)三次方=3xy(x+y)√x(x+y)再问:请问过程再答:√9x³y²(x+y)³=√3²x²y²(x+y)
(X+Y)³=X³+3X²Y+3XY²+Y³再问:(x+y)³=x³+3x²y+3xy²+y³再答:
是非奇非偶函数因为取x时与取-x时不符合上述函数的性质x^3是奇函数,x^-2是偶函数,复合就是非奇非偶再问:你这是网上随便弄来的答案吧,正确答案是奇函数,你不要随便乱答了再答:没有啊,其实题目有问题