1 |
2 |
2 |
3 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
3(1-3n) |
1-3 |
n |
2 |
3 |
4 |
1 |
4 |
3 |
4 |
1 |
4 |
(5+2n+3)n |
2 |
3 |
4 |
3(1-3n) |
1-3 |
n(n+4) |
4 |
9 |
8 |
n(n+4) |
4 |
2 |
3 |
1 |
2 |
2 |
3 |
1 |
2 |
1-3n |
1-3 |
1-2n |
2 |
1 |
2 |
1+(2n-1)•3n |
4 |
A.1 | B.-1 | C.51 | D.52 |
1 |
3 |
1 |
2 |
1 |
4 |
1 |
2n-1 |
1 |
3n-1 |
n |
k-1 |
A.Sk+1=Sk+
| B.Sk+1=1+
| ||||
C.Sk+1=Sk+ak+1 | D.Sk+1=3Sk-3+ak+ak+1 |
© 2017-2019 超级试练试题库,All Rights Reserved.