a1 |
b1 |
a2 |
b2 |
an |
bn |
2n+3 |
2n |
1 |
n |
a1 |
b1 |
a2 |
b2 |
an |
bn |
1 |
2 |
3 |
22 |
5 |
23 |
2n-1 |
2n |
1 |
2 |
1 |
22 |
3 |
23 |
5 |
24 |
2n-1 |
2n+1 |
1 |
2 |
1 |
2 |
1 |
22 |
1 |
23 |
1 |
2n |
2n-1 |
2n+1 |
1-
| ||
1-
|
2n-1 |
2n |
1 |
2n-2 |
2n-1 |
2n |
2n+3 |
2n |
2n+3 |
2n |
1 |
n |
1 |
n |
1 |
n |
1 |
n |
2n+3 |
2n |
1 |
n |
1 |
n |
2n+3 |
2n |
1 |
n |
A.an=4n-3 | B.an=2n-1 | C.an=4n-2 | D.an=2n-3 |
1 |
an+1 |
A.-
| B.
| C.
| D.5 |
A.6 | B.7 | C.8 | D.9 |
© 2017-2019 超级试练试题库,All Rights Reserved.