用
纸复印文件,在甲复印店不管一次复印多少页,每页收费0.1元.在乙复印店复印同样的文件,一次复印页数不超过20时,每页收费0.12元;一次复印页数超过20时,超过部分每页收费0.09元.
设在同一家复印店一次复印文件的页数为
为非负整数).
(1)根据题意,填写下表:
一次复印页数(页![](/wiris/showimage?formula=2DD4980E197E7BD4E169104818DAC6D184AA5F8B76DC714D2CBE3EE68C94FBF798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46) |
5 |
10 |
20 |
30 |
![](/wiris/showimage?formula=A8AB58524E970ED52DDCC04C74D3D6495A4E4E0897E3D2842190CBAE0FEE584798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46)
|
甲复印店收费(元![](/wiris/showimage?formula=2DD4980E197E7BD4E169104818DAC6D184AA5F8B76DC714D2CBE3EE68C94FBF798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46) |
0.5 |
|
2 |
|
![](/wiris/showimage?formula=A8AB58524E970ED52DDCC04C74D3D6495A4E4E0897E3D2842190CBAE0FEE584798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46)
|
乙复印店收费(元![](/wiris/showimage?formula=2DD4980E197E7BD4E169104818DAC6D184AA5F8B76DC714D2CBE3EE68C94FBF798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46) |
0.6 |
|
2.4 |
|
![](/wiris/showimage?formula=A8AB58524E970ED52DDCC04C74D3D6495A4E4E0897E3D2842190CBAE0FEE584798380531A7F73EC55F5CB5D0D84294B4B628A0891AC8F98088CC4FDF478B476C9498CC148A5D16709B8B381E9FE488AE24D94C5F70D64F35E13C1D177937EAD0228E3928B6B51B32B2494BF58EDFDA46)
|
(2)设在甲复印店复印收费
元,在乙复印店复印收费
元,分别写出
,
关于
的函数关系式;
(3)当
时,顾客在哪家复印店复印花费少?请说明理由.