1 |
an+1 |
1 |
an+2 |
1 |
an+3 |
1 |
a2n |
n(n+1) |
2 |
1 |
an+1 |
1 |
an+2 |
1 |
a2n |
1 |
(n+1)(n+2) |
1 |
(a+2)(a+3) |
1 |
2n(2n+1) |
1 |
(n+1) |
1 |
(n+2) |
1 |
(n+2) |
1 |
(n+3) |
1 |
2n |
1 |
2n+1 |
1 |
(n+1) |
1 |
(2n+1) |
n |
2n2+3n+1 |
1 | ||
(2n+
|
1 |
x |
1 |
x2 |
1 |
6 |
A.5 | B.6 | C.4 | D.8 |
1 | ||||
|
1 |
2 |
A.
| B.n+1-
| C.
| D.2-
|
1 |
an |
A.
| B.
| C.121 | D.31 |
A.2n+1+n-2 | B.2n+1-n+2 | C.2n-n-2 | D.2n+1-n-2 |
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