an |
2 |
1 |
an |
2 |
2 |
1 |
n |
1 |
an |
2 |
2 |
2 |
1 |
a1 |
3 |
2 |
2 |
1 |
2 |
2 |
1 |
k |
1 |
ak |
1 |
ak |
2 |
2 |
2 |
2 |
1 |
k |
2 |
1 |
k |
1 | ||||
|
2 |
1 |
k |
1 | ||||
|
2 |
1 |
k+1 |
0.5(
| ||||||||||
|
| ||||||
|
4k3+(4+2
| ||||
4k3+4(1+
|
2 |
1 |
k |
1 | ||||
|
2 |
1 |
k+1 |
2 |
1 |
k+1 |
2 |
1 |
n |
2 |
2 |
1 |
n |
n(n+1) |
12 |
| ||
2 |
21 |
4 |
lim |
x-∞ |
A.
| B.
| C.-
| D.-
|
3 |
x |
lim |
n→∞ |
lim |
n→∞ |
1 |
2 |
|
nf(n+1) |
f(n) |
|
lim |
n→∞ |
1 |
S1 |
1 |
S2 |
1 |
Sn |
© 2017-2019 超级试练试题库,All Rights Reserved.