| x |
| 10 |
现在卖出个数为B(1-
| bx |
| 10 |
现在售货金额为A(1+
| x |
| 10 |
| bx |
| 10 |
| x |
| 10 |
| bx |
| 10 |
应交税款为AB(1+
| x |
| 10 |
| bx |
| 10 |
| a |
| 10 |
剩余款为y=AB(1+
| x |
| 10 |
| bx |
| 10 |
| a |
| 10 |
| a |
| 10 |
| b |
| 100 |
| 1−b |
| 10 |
所以x=
| 5(1−b) |
| b |
要使y最大,x的值为
| 5(1−b) |
| b |
| x |
| 10 |
| x |
| 10 |
| bx |
| 10 |
| x |
| 10 |
| bx |
| 10 |
| x |
| 10 |
| bx |
| 10 |
| x |
| 10 |
| bx |
| 10 |
| a |
| 10 |
| x |
| 10 |
| bx |
| 10 |
| a |
| 10 |
| a |
| 10 |
| b |
| 100 |
| 1−b |
| 10 |
| 5(1−b) |
| b |
| 5(1−b) |
| b |