1 |
f(n) |
A.
| B.
| C.
| D.
|
1 |
f(n) |
1 |
f(n) |
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
f(n) |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
n |
1 |
n+1 |
1 |
n+1 |
1 |
2011 |
2010 |
2011 |
S1+S2+…+Sn |
n |
A.990 | B.991 | C.992 | D.993 |
1 |
2 |
1 |
bn |
1 |
4 |
an-1 |
(-1)nan-1-2 |
1 | ||
|
(2n-1)π |
2 |
4 |
7 |
4Sn |
n+3 |
2nπ |
3 |
A.2013 | B.671 | C.-671 | D.-
|
© 2017-2019 超级试练试题库,All Rights Reserved.