若不等式组{(1)3x+y=k+1(2)x+3y=3的解x,y满足0

问题描述:

若不等式组{(1)3x+y=k+1(2)x+3y=3的解x,y满足0

3x+y=k+1,x+3y=3,4x+4y=k+1+3=k+4,0