已知y满足不等式(-y+1/2)-y>2+(y+2/3),化简/y+1/+/2y-1/=_____ 急!
已知y满足不等式(-y+1/2)-y>2+(y+2/3),化简/y+1/+/2y-1/=_____ 急!
已知y满足不等式2分之y+1-y>2+三分之y+2,化简y加一的绝对值+2y-1的绝对值
已知变量x,y满足约束条件x+2y-3=0,y-1
已知X和Y满足3X+4Y=2,X-Y-1/7
设函数y=y(x)满足微分方程y″-3y′+2y=2e^x 且曲线y=y(x)在(0.1)处与已知曲线y=x^4-x+1
已知有理数x,y满足1/2|x-y|+|y-1/2|=0 求3x+7y
已知:x,y满足|2x-y|+|y-1/2|=0,求7x-3y的值.
已知实数x,y满足根号(x+3y-1)+y²+2y+1=0,求2x-y的平方根
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
已知7/3*根号(9y)-y-2y*1/y=-2,求y的值
已知实数x,y满足不等式组:2x-y=0,x+2y
已知x,y满足不等式组(y=0),x^2+y^2