1 |
2 |
1 |
2 |
an |
an-1 |
n2-1 |
(n-1)2 |
n+1 |
n-1 |
a2 |
a1 |
a3 |
a2 |
a4 |
a3 |
an |
an-1 |
1 |
3 |
2 |
4 |
n-2 |
n |
n-1 |
n+1 |
an |
an-1 |
1 |
3 |
2 |
4 |
n-2 |
n |
n-1 |
n+1 |
1 |
n(n+1) |
1 |
n(n+1) |
n+1 |
n+2 |
A.有最小值63 | B.有最大值63 | C.有最小值31 | D.有最大值31 |
5 |
6 |
1 |
f(n) |
m |
2012 |
an |
1 |
2 |
-1 |
an+1log2bn+1 |
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