ab?2 |
∴a-1=0,ab-2=0,
解得a=1,b=2,
1 |
ab |
1 |
(a+1)(b+1) |
1 |
(a+2)(b+2) |
1 |
(a+2009)(b+2009) |
=
1 |
1×2 |
1 |
2×3 |
1 |
2010×2011 |
=1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2010 |
1 |
2011 |
=1-
1 |
2011 |
=
2010 |
2011 |
ab?2 |
1 |
ab |
1 |
(a+1)(b+1) |
1 |
(a+2)(b+2) |
1 |
(a+2009)(b+2009) |
ab?2 |
1 |
ab |
1 |
(a+1)(b+1) |
1 |
(a+2)(b+2) |
1 |
(a+2009)(b+2009) |
1 |
1×2 |
1 |
2×3 |
1 |
2010×2011 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2010 |
1 |
2011 |
1 |
2011 |
2010 |
2011 |