1 |
2 |
11 |
2 |
6 |
(2an-11)(2bn-1) |
k |
57 |
1 |
2 |
11 |
2 |
1 |
2 |
11 |
2 |
1 |
2 |
11 |
2 |
bn+bn+2 |
2 |
|
|
6 |
(2an-11)(2bn-1) |
6 |
[2(n+5)-11][2(3n+2)-1] |
2 |
(2n-1)(2n+1) |
1 |
2n-1 |
1 |
2n+1 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
3 |
2 |
3 |
k |
57 |
k |
57 |
2 |
3 |
k |
57 |
a1 |
2 |
a2 |
22 |
an |
2n |
A.3 | B.4 | C.6 | D.12 |
A.7 | B.9 | C.17 | D.19 |
© 2017-2019 超级试练试题库,All Rights Reserved.