文档介绍：:..高中数学线性规划题库满分:班级:_________  姓名:_________  考号:_________  一、单选题(共26小题),y满足约束条件则z=3x+y的最大值为( )                                 D.-1           (  )           B.-2                      D.-1           ,y满足约束条件则目标函数z=3x-y的取值范围是( )A.            B.           C.[-1,6]            D.           ,y满足则2x+3y的最大值为( )                                              ,则的最大值为( )A.              B.           C.           D.           ,y满足的最大值为( )                         C.           D.           ,则目标函数的最大值是( )                                             ,y满足约束条件则z=2x+y的最大值和最小值分别为( )                                             ),当时取得极大值,当时取极小值,则的取值范围是( )A.             B.           C.           D.           ,y满足约束条件,则目标函数的最小值为( )A.-5            B.-4           C.-2                      ,y满足约束条件则z=2x-3y的最小值是( )A.-7           B.-6           C.-5           D.-3           ,满足约束条件,若目标函数的最小值为2,则的最大值为( )           B.           C.           D.           ,y满足的约束条件,则的最大值为(  )                                            ,满足约束条件则目标函数的最小值为(  )                                            -4,则的值为(  )A.           B.           C.           D.           ,满足约束条件且的最小值为7,则(  )A.-5                      C.-5或3           -3           ,若取得最大值的最优解不唯一,则实数的值为(  )A.           B.                      D.           ,则M-m=(  )                                            (  )                                            ,y满足(  ),最大值3           ,,无最小值           ,、y满足约束条件,目标函数z=ax+2y仅在点(1,0)处取得最小值,则a的取值范围是(  )A.(-1,2)           B.(-4,2)           C.(-4,0]           D.(-2,4)           ,若不等式组为常数)所表示的平面区域的面积等于2,则的值为(  )A.