求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
求5x-2y=x-y=4x-3y-2的解
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
5x+6y+3x-4y+3-x+x =5x+3x-x+x+6y-4y+3 =8x=2y+3 谁能告诉我这题合并同类项的解
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值