若xy满足丨x+1丨+丨y-2013丨小于等于0,求xy的值

若xy满足丨x+1丨+丨y-2013丨小于等于0,求xy的值 如果有理数xy满足丨x-1丨+（xy-2)²=0 求x和y的值 先化简,再求值3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y先化简,再求值：3x²y-[2xy²-2(xy-3/2x²y)+2xy]-2x²y,其中x,y满足（x+2）²+丨y-1丨＝0 若x,y满足丨x-3丨+(x+y)的四次方=0,则xy的倒数是 先化简,再求值 ：(xy-3x^2)-2(xy-2x^2-1),其中x、y满足条件丨x+2丨+（y-1）^2=0 若实数xy满足x-y+1 若xy为实数且满足丨x+3丨加根号y-3=0,则根号y比x的2013值是 5x²y-[2x²y-3(xy²-2x²y+2xy²)],其中x,y满足丨x-1丨+（y+2）²=0 若实数x、y满足xy≠0,则m=x/丨x丨+丨y丨/y的最大值 ：如果x,y表示有理数,且x,y满足条件丨x丨=5,丨y丨=2,丨x-y丨=y-x,求xy+(2x-1)÷y的值 求3xy的2次方-4x的2次方y-2xy的2次方+5x的2次方y的值,其中x,y满足丨x-1丨+(y+2)的2次方=0 求3xy的平方-4x的平方y-2xy的平万方 5x的平方y的值其中x,y满足丨x-1丨+(y＋2)的平方＝0 -3(2x^2-xy)-4(-6+xy+x^2)其中x,y满足(x+2)^2+丨y-3丨=0 化简并求值：3xy^2-4x^2y-2xy^2+5x^2y,其中x、y满足丨x-1|+(y+2)^2=0. 实数x,y满足{x+2y-4+丨x+2y-4丨≤6,1≤x≤5,1≤y≤3},求u=(x^2+y^2)/xy的取值范围! 若x、y满足|x+1|+|y-2013|≤0,求xy的值 若xy都是有理数,且满足丨x-3丨+(y+3)²;则（x/y）二零一二次方=_______ 若xy满足x²+2x+y-2√y-1=-1,求xy,