y=(x+2x+3)/(x+4x+5)的值域

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 解整式：8x的平方-【3x+5(2x的平方-3x)+3】-2(3x-2) (4x-2y)-{5x-[8y-2x-(x+y)]-x}8x的平方-【3x+5(2x的平方-3x)+3】-2(3x-2)； (4x-2y)-{5x-[8y-2x-(x+y)]-x} 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值. 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5 y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|的最小值为 y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|+50n的最小值 -3^2 x (-3)^5+(-3)^3 x (-3)^4,(-x-y)^4 x (x+y)^3,x^4×x^4-(x^8+x^8)整式的乘法 5x=3y,(2x+y)的平方=5x(x+y)+9 xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1 化简 x-[y-2x-(x-y) -9-4[2x-5(x+1)] 2x-3{y-[3x-(2y-x)]-2x}过程一步一步的列好x-[y-2x-(x-y) -9-4[2x-5(x+1)] 2x-3{y-[3x-(2y-x)]-2x} 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值 函数y=(x^2-4x-5)/(x^2-3x-4)的值域是?.. 求函数y=(x^2-4x+5)/(x^2-3x-4)的值域