1 |
2 |
1 |
3 |
1 |
n+1 |
1 |
n |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
2 |
1 |
n |
1 |
2 |
x |
1 |
10 |
A.大于0 | B.等于0 | C.小于0 | D.不大于0 |
1 |
x |
1 |
x |
π |
4 |
5π |
12 |
a+c |
b |
A.(1,+∞) | B.[1,+∞) | C.(2,+∞) | D.[2,+∞) |
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