.已知实数x,y满足则z=4x+6y+3的取值范围为( )A.[17,48] ... 问题详情：.已知实数x,y满足则z=4x+6y+3的取值范围为()A.[17,48] B.[17,49] C.[19,48] D.[19,49]【回答】B解析由z=4x+6y+3得y=-x+,作出...
![.已知实数x,y满足则z=4x+6y+3的取值范围为( )A.[17,48] ...](https://i1.guowenba.com/2a3f740786fedf90c5/2b2f7f1c/726a2d/786d2d45d0a7ca97d744-s.jpg ".已知实数x,y满足则z=4x+6y+3的取值范围为( )A.[17,48] ...")