| a−1 |
∴a-1=0，ab-2=0，
∴a=1，b=1
原式=
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 2 |
| 3×4 |
| 1 |
| 2013×2014 |
=1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2013 |
| 1 |
| 2014 |
=1-
| 1 |
| 2014 |
=
| 2013 |
| 2014 |
| 1 |
| 1×2 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2×3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3×4 |
| 1 |
| 3 |
| 1 |
| 4 |
| a−1 |
| 1 |
| ab |
| 1 |
| (a+1)(b+1) |
| 1 |
| (a+2)(b+2) |
| 1 |
| (a+2012)(b+2012) |
| a−1 |
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 2 |
| 3×4 |
| 1 |
| 2013×2014 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2013 |
| 1 |
| 2014 |
| 1 |
| 2014 |
| 2013 |
| 2014 |