题目内容
A.[2,6] B.[2,5]
C.[3,6] D.[3,5]
A
解析:∵A(2,0)、B(2,2),当直线过点A(2,0)时,zmin=2.过点B(2,2)时,zmax=2+4=6.
A.[2,6] B.[2,5] C.[3,6] D.[3,5]
A.2 B.3 C.5 D.6
A.[2,6] B.[2,5] C.[3,6] D.[3,5]