1 |
1 |
2 |
1 |
1 |
2 |
3 |
1 |
2 |
2 |
1 |
3 |
4 |
1 |
3 |
2 |
2 |
3 |
1 |
4 |
A.(0,
| B.[
| C.[1,10] | D.(10,+∞) |
1 |
1 |
2 |
1 |
1 |
2 |
3 |
1 |
2 |
2 |
1 |
3 |
4 |
1 |
3 |
2 |
2 |
3 |
1 |
4 |
1 |
k |
k(k+1) |
2 |
63 |
1 |
62 |
2 |
61 |
3 |
60 |
4 |
1 |
63 |
7 |
57 |
1 |
10 |
1 |
2 |
A.第19项 | B.第20项 | C.第21项 | D.第22项 |
1 |
2 |
1 |
3 |
1 |
4 |
A.f(n)+n+1 | B.f(n)+n | C.f(n)+n-1 | D.f(n)+n-2 |
an+1 |
an |
| ||
|
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