若x^2y^3

来源：学生作业帮助网编辑：六六作业网时间：2024/12/19 08:08:18

若x^2y^3若x^2y^3若x^2y^3从X^2*Y^3-2xy·|-1/2x^5·(-y)^7|=-2XY*(1/2)*|-x^5|*(-Y)^7=-X*Y^8*|-x^5|(1)如果X>0,则-

若x^2y^3
若x^2y^3<0,化简-2xy·|-1/2x^5·(-y)^7|

若x^2y^3
从X^2*Y^3<0, 推出Y<0, X不等于0..
-2xy·|-1/2x^5·(-y)^7| = -2XY*(1/2)*|-x^5|*(-Y)^7 = -X*Y^8*|-x^5|
(1) 如果X>0, 则 -X*Y^8*|-x^5| = -X*Y^8*X^5 = -X^6*Y^8
(2) 如果X<0, 则 -X*Y^8*|-x^5| = -X*Y^8*(-X^5) = X^6*Y^8

从X^2*Y^3<0, 得出Y<0, X不等于0..
初步化简得，xy^8*|x^5|
当x＞0时，xy^8*|x^5|=x^6y^8
当x＜0时，xy^8*|x^5|=-x^6y^8

若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于若x、y互为相反数,则x+2x+3x+...100x+100y+99y+98y+...+y 若2x=3y,则(x*x+y*y)/x*x=? x(x-y)2-(y-x)3 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若x+2y分之x-y=3,则代数式x+2y分之2（x-y)-3(x-y)分之x+2y的值为若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若x=-1/4,能否确定代数式(2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)的值? 若X=负四分之一,能否确定代数式(2X-Y)(2X+Y)+(2X-Y)(Y-4X)+2Y(Y-3X)的值? 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值若x+y=4,则多项式1/2(x+y)+4(x-y)-3（x-y）-3/2(x+y)-x+y值是（）若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x