若圆(x-a)^2+(y-b)^2=6始终平分圆x^2+y^2+2x+2y-3=0的周长,则动点M(a,b)的轨迹方程是?
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(2a+b)(2a-3b)+3a(2a+b)和x(x+y)(x-y)-x(x+y)²4a(x+y)-6x-6y和啊a(a-b)-ab+b²
已知实数a,b,x,y,满足不等式(a+b)(x+y)>2(ay+bx),求证(x-y)/(a-b)+(a-b)/(x-y)>=2
如果A={(x,y)|x,y+2>0},B={(x,y)|2x+3y-6>0},C={(x,y)|x-4
x+y-(2x-y)(x+y)=?12(a^2-b^2)^2-3(a^2+b^2)(a+b)^2等于多少(2a-b)(2a+3b)+3a(b-2a)=-(2a-b)( ),a(x-3)(5-x)+b(3-x)(x-5)=( )(x-3)(a+b)代数式15x^3y^3(x-y),6x^2y^2(y-x),-120x^3y^3(x-y)(x+y)的公因式是?a-b+k(b-a)=( )(k-1)a(b-c)+c-b=(b-c)
1(x-3x-1)(x+3y-1)2(3x-2y+1/4)²3(a+b)²-(a-b)²4 [2x²-(x+y)(x-y)][(-x-y)×(y-x)+2y²],其中x=1 y=25[(0.5x-y)²+(0.5x+y)²](0.5x²-2y²)6(a+3b)²-2(a+3b)(a-3b)+(a-3b)²7
A={(x,y)|2x-y=1},B={(x,y)|5x+y=6},求A∩B
(1)(x+y)^2-(x+y)^3(2)(x-y)-(x-y)^3(3)(x-y)^2-(y-x)^3(4)2(x-y)-3(y-x)^2(5)4ab(a=b)^2-6a^2b(a+b)(6)(x+y)^2(x-y)+(x+y)(x-y)^2(7)2a(a-3)^2-6a^2(3-a)+8a(a-3)(8)24xy^2z^2(x+y-z)-32xyz(z-x-y)^2+8xy(z-x-y)(9)(a-b)(b-a)^n(b-a)^2n-1 [两解)(10)2^2=3,2^b
2y(2y-x)四次方/6x(x-2y)三次方 分式约分~例如:A/B=a×b/a×c=b/c
(x+a)/2+(y-b)/3=a/2(x+a)/2-(y-b)=b/3(3x+2y)/4=(2x+y)/5=(x-y+1)/6
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
(a-b)+(-2a-b)=?(x+y-z)+(x-y+z)-(x-y-z)=?
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
已知有理数A,B,X,Y满足A+B ≠0,且(A+B):(A-B)=(2X+Y):(X-y) 那么A:(A+B)=?A.3X:(2X+Y) B.3X:(4X+2Y)C.X:(X+Y)D.2X:(2X+Y)
解方程:6(a-b)-7(a+b)=21① 2(a-b)-5(a+b)=-1②x+y/2+x-y/3=6①4(x+y)-5(x-y)=2②两题的啊6(a-b)-7(a+b)=21① {x+y/2+x-y/3=6①2(a-b)-5(a+b)=-1② {4(x+y)-5(x-y)=2②
两个数学计算.a/b-(a-b)/b=x^2+xy/(x-y)÷xy/(x-y)
交集,并集的题A={(x,y)|3x+2y=1},B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(x,y)|6x+4y=2},求A∩B,B∩C,A∩D,B∩D
3a+b/a平方-9b平方 - 2a-b/a平方+ab-6b平方 + a-b/5ab-a平方-6b平方 (xy-x平方)*xy/x-y[(x/y-y/x 除以(x+y)+x(1/y-1/x)]除以1+x/y 若10的2y次方=25,则10的负y次方等于多少?1/x平方-1 - 2/x+1 + 3/1 - x=0(方程) 3
已知有理数A,B,X,Y满足A+B ≠0,且(A+B):(A-B)=(2X+Y):(X-y) 那么A:(A+B)=?A. 3X:(2X+Y) B. 3X:(4X+2Y)C. X:(X+Y)D. 2X: (2X+Y0麻烦带上解题过程...谢谢