若正整数x,y满足1/x-1/y=1/182,且x:y=7:13,则x+y=___
已知x,y为正整数,且满足2x^2+3y^2=4x^2y^2+1;则x^2+y^2=___
x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y
若X>1,Y>0,且满足XY=X的Y次方,X/Y=X的3Y次方,则X+Y等于?
1 题 规定运算*,使得x*y=x²+y²,若x,y是正整数,且x*y=625,求x+y=
若x>1,y>0,且满足 xy=x^y,x/y大于等于x^3y,则y则 最大值
设正整数x不等于y,且满足1/x+1/y=2/5,则x^2+y^2的值是
已知实数x,y满足xy+1=2x+y,且x>1,则(x+1)(y+2)的最小值为 ___ .
若变量x,y满足约束条件{x>=-1;y>=x;3x+2y
若实数x,y满足x-y+1>=0,x+y>=0,x
若实数x,y满足x-y+1》=0,x+y>=0,x
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值