| 41−x |
| 41−x+2 |
| 4 |
| 4+2•4x |
| 2 |
| 2+4x |
∴f(x)+f(1-x)=
| 4x |
| 4x+2 |
| 2 |
| 2+4x |
∴f(
| 1 |
| 1001 |
| 1000 |
| 1001 |
| 2 |
| 1001 |
| 999 |
| 1001 |
| 500 |
| 1001 |
| 501 |
| 1001 |
∴f(
| 1 |
| 1001 |
| 2 |
| 1001 |
| 3 |
| 1001 |
| 1000 |
| 1001 |
| 4x |
| 4x+2 |
| 1 |
| 1001 |
| 2 |
| 1001 |
| 3 |
| 1001 |
| 1000 |
| 1001 |
| 41−x |
| 41−x+2 |
| 4 |
| 4+2•4x |
| 2 |
| 2+4x |
| 4x |
| 4x+2 |
| 2 |
| 2+4x |
| 1 |
| 1001 |
| 1000 |
| 1001 |
| 2 |
| 1001 |
| 999 |
| 1001 |
| 500 |
| 1001 |
| 501 |
| 1001 |
| 1 |
| 1001 |
| 2 |
| 1001 |
| 3 |
| 1001 |
| 1000 |
| 1001 |