n(n-1)•…•2•1 |
10n |
A.递增数列 | B.递减数列 |
C.从某项后为递减 | D.从某项后为递增 |
(n+1)•n…2•1 |
10n+1 |
n(n-1)…2•1 |
10n |
n(n-1)…2•1 |
10n |
n+1 |
10 |
n(n-1)…2•1 |
10n |
n-9 |
10 |
1 |
n+2 |
an |
an+1 |
A.
| B.
| C.
| D.
|
cn+an |
2 |
bn+an |
2 |
A.{Sn}为递减数列 |
B.{Sn}为递增数列 |
C.{S2n-1}为递增数列,{S2n}为递减数列 |
D.{S2n-1}为递减数列,{S2n}为递增数列 |
2 |
3 |
2 |
3 |
A.最大项为0,最小项为-
| ||
B.最大项为0,最小项不存在 | ||
C.最大项不存在,最小项为-
| ||
D.最大项为0,最小项为a4 |
A.68 | B.464 | C.468 | D.666 |
© 2017-2019 超级试练试题库,All Rights Reserved.