1 |
n+1 |
1 |
n+2 |
1 |
2n+1 |
A.an>an+1 | B.an<an+1 |
C.an=an+1 | D.与n的值有关 |
1 |
n+2 |
1 |
n+3 |
1 |
2(n+1) |
1 |
n+1 |
1 |
n+2 |
1 |
2n+1 |
1 |
2n+2 |
1 |
2n+3 |
1 |
n+1 |
1 |
2n+3 |
1 |
2n+2 |
10 |
2(3n-1) |
A.10 | B.11 | C.12 | D.13 |
1 |
2 |
1 |
4 |
A.
| B.
| C.
| D.
|
A.an=2n-1 | B.an=1-2n | C.an=3n-1 | D.an=2n+1 |
A.an=n | B.an=n-1 | C.an=n+1 | D.an=2n-1 |
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