题目内容
已知3x2+2y2≤6,求2x+y的最大值.
已知3x2+2y2≤1,则3x+2y的取值范围是
[0,]
[,0]
[,]
[-5,5]
已知3x2+2y2=2x,则k=x2+y2的取值范围是________.