求x^(2/3)+y^(2/3)=a^(2/3)求该曲线所围成的图形面积

已知方程组 2x+y=3a x-2y=a 求x/y x+y=a,x-y=b.求2x-3y等于 已知a^x=2,a^y=3,求a^x+y 已知x+y+z=3a,（a≠0,x,y,z不全等）.求（x-a)(y-a)+(y-a)(z-a)+(z-a)(x-a)／(x-a)^2+（y-a）^2+（z-a）^2 x+y+z=3a(a不等于0,x,y,z不全相等）求[（x-a)(y-a)+(y-a)(z-a)+(z-a)(x-a)]/[(x-a)^2+(y-a)^2+(z-a)^2] 已知X+Y+Z=3a求(X-a)(Y-a)+(Y-a)(Z-a)+(Z-a)（X-a)/(X-a)2;+（Y-a)2;+（Z-a)2;,a≠0,X,Y,Z不全相等, 几道比例线段题目已知两实数a,b满足a^2-4ab+4b^=0,求(a+b)/a已知x/2=y/3,求(x-y)/y ,(x+y)/y ,(x+y)/(x-y) 已知：A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B 1、(-y^3)^5/y^3/ y^2+2(-y)^102、(x-y)^7/(y-x)^6+(x+y)^3/(x+y)^23、已知X^a=5,x^b=3,求X^(3a-2b)的值 2x^2y*A=(-6x^3y^2+9X^2y^3 ,求A=? 如果(2x^2)y*A=(6x^2)(y^2)-(4x^3)(y^3),求多项式A 已知2x+y=3a,x-2y=a,求y分之x的值. A={(x,y)|x=2},B={(x,y)|y=3},求A∩B和AUB a^6x=3,a^2y=2,求a^3x,a^2x+y的值 已知,a^x=2,a^y=3,求x+y的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m,n的值 初一因式分解练习题,谁好心帮我解下表示平方1.2X~-3XY-X2.(X+Y)~(X+Y)(X-Y)(X+Y)(Y+Z)3.3X(a+2b)~-6XY(a+2b)4.a(x-y)-b(X-Y)-C(Y-X)5.(b-a)~-2a+2b6.(x-y)~-m(y-x)+y-x7.x(x-y)(a-b)-y(y-x)(b-a)8.已知a+b=13,ab=40,求 b+ab~的值