題目列表(包括答案和解析)
觀察下列等式:
(1)根據(jù)發(fā)現(xiàn)的規(guī)律,寫出第個(gè)式子________________________.
(2)利用規(guī)律計(jì)算:
…____________.
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2007×2008 |
1 |
2008×2009 |
2008 |
2009 |
2008 |
2009 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2007×2008 |
1 |
2008×2009 |
1 |
1×2 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
n(n+1) |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
2007×2009 |
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