题目列表(包括答案和解析)
-2 |
-1-2 |
4 |
4-1 |
-1 |
0-2 |
3 |
3-1 |
3 |
4-2 |
-1 |
-1-1 |
4 |
5-2 |
-2 |
-2-1 |
6 |
7-2 |
() |
()-1 |
2 |
2-4 |
6 |
6-4 |
5 |
5-4 |
3 |
3-4 |
7 |
7-4 |
1 |
1-4 |
10 |
10-4 |
-2 |
-2-4 |
20 |
20-4 |
() |
()-4 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×5 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
1×4 |
1 |
4×7 |
1 |
7×10 |
1 |
(3n-2)(3n+1) |
1 |
1×2 |
1 |
1 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
2 |
1×2 |
2 |
2×3 |
2 |
3×4 |
2 |
n×(n+1) |
5 |
3 |
5 |
8 |
5 |
3 |
5 |
8 |
9 |
2 |
9 |
11 |
9 |
2 |
9 |
11 |
10 |
7 |
10 |
17 |
10 |
7 |
10 |
17 |
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