作业帮∫∫∫(x^2 a^2 y^2 b^2 z^2 c^2)dv
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/07 10:53:20
4ab(a+b)^2-6a^2b(a+b)=2ab(a+b)[2(a+b)-3a]=2ab(a+b)(2b-a)(x+y)^2(x-y)+(x+y)(x-y)^2=(x+y)(x-y)[(x+y)+(
a(y-x)-2b(x-y)=a(y-x)+2b(y-x)=(y-x)(a+2b)
(1)(a+2b/a-b)+(b/b-a)-(2a/a-b);=(a+2b)/(a-b)-b/(a-b)-2a/(a-b)=(a+2b-b-2a)/(a-b)=(-a+b)/(a-b)=-1(2)(y
分成两部分计算：∫∫bdσ表示一个圆柱的体积,圆柱的底圆为x²+y²≤a²,高为b,因此体积为：πa²b∫∫√(x²+y²)dσ表示一个圆柱
(2x+y)(2x-3y)+x(2y+y)=(2y+y)(2x-3y+x)=(2y+y)(3x-3y)=3(2y+y)(x-y)2a(x-y)-4b(x-y)=2(x-y)(a-2b)
1.[(a+b)^2-(a+b)(a-b)]÷(-b)=[(a+b)(a+b-a+b)]÷(-b)=[(a+b)(2b)]÷(-b)=-2(a+b)或者：=-2a-2b2.[(x+y)(2x+y)+(
a^2(a-b)+(b-a)=（a²-1）·（a-b）=（a+1）·（a-1）·（a-b）(x-y)^2-2(y-x)+1=(x-y)^2+2(x-y)+1=[(x-y)+1]²=
x（a-x）(a-y)-y(x-a)(y-a)=(x-y)(x-a)(y-a)-ab(a-b)^2+a(b-a)^2=(a-b)^2(-ab+a)=a(a-b)^2(1-b)a^3b-ab=ab(a^
y=a+b*a-b-a+b/a-b=5+2*5-5+2/5-2
p(x-y)-q(y-x)=p(x-y)+q(x-y)=(p+q)(x-y)(a+b)(a-b)-(b+a)=(a+b)(a-b-1)10a(x-y)^2-5b(y-x)=10a(x-y)^2+5b(
3x(a-b)-2y(b-a)=3x(a-b)+2y(a-b)(括号内外同时变号）=（a-b)(3x+2y)(提取公因式（a-b))
A+B=(x²-3xy+y²)+(2x²+xy-9y²)=x²-3xy+y²+2x²+xy-9y²=3x²-2
(1).(x+y)(a+2b)=ax+2bx+ay+2by(2).(2a+3)(2/3b+5)=4/3ab+10a+2b+15(3).(2x+3)(-x-1)=-2x^2-2x-3x-3=-2x^2-
1.2a(x-y)-3b(y-x)=2a(x-y)+3b(x-y)=(2a+3b)(x-y)2.-x^y-2xy+35y=-y(x^+2x-35)=-y(x-7)(x+5)3.a^(x-y)-4b^(
(3x-y)(3x+y)+y(x+y)=9x²-y²+xy+y²=9x²+xy=x(9x+y)(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)=a
（x+y)*(a+2b)=a·x+2b·x+y·a+2b·y=ax+2bx+ya+2by
原式=x(a-2b)+y(a-2b)=ax-2bx+ay-2by