題目列表(包括答案和解析)
|
1 |
2 |
1 |
1×2 |
1 |
1 |
1 |
2 |
1 |
6 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
12 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
20 |
1 |
4×5 |
1 |
4 |
1 |
5 |
1 |
30 |
1 |
5×6 |
1 |
5 |
1 |
6 |
1 |
(x-4)(x-3) |
1 |
(x-3)(x-2) |
1 |
(x-2)(x-1) |
1 |
(x-1)x |
1 |
x(x+1) |
1 |
x+1 |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
2009×2011 |
1 |
2 |
1 |
2 |
1 |
6 |
1 |
2 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
4 |
1 |
20 |
1 |
4 |
1 |
5 |
1 |
30 |
1 |
5 |
1 |
6 |
1 |
5 |
1 |
6 |
1 |
42 |
1 |
6 |
1 |
7 |
1 |
6 |
1 |
7 |
1 |
n |
1 |
n+1 |
1 |
n |
1 |
n+1 |
1 |
x(x+1) |
1 |
(x+1)(x+2) |
1 |
(x+2)(x+3) |
1 |
(x+2008)(x+2009) |
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
30 |
1 |
42 |
1 |
56 |
1 |
72 |
10 |
9 |
10 |
9 |
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