2x | ||
2x+
|
op |
1 |
2 |
op1 |
op2 |
1 |
2 |
1 |
n |
2 |
n |
n-1 |
n |
n |
n |
1 | ||||
(Sn+
|
2 |
OP |
1 |
2 |
OP1 |
OP2 |
2x1 | ||
2x1+
|
2x2 | ||
2x2+
|
1 |
2 |
2 |
1 |
n |
2 |
n |
n-1 |
n |
n |
n |
n |
n |
n-1 |
n |
2 |
n |
1 |
n |
2 |
2 |
n+3-2
| ||
2 |
2 |
n+3 |
2 |
2 |
n+4 |
2 |
1 | ||||
(Sn+
|
4 |
(n+3)(n+4) |
1 |
n+3 |
1 |
n+4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
1 |
n+3 |
1 |
n+4 |
n |
n+4 |
2 |
Tn | ||
Sn+2+
|
2 | ||
n+
|
20 |
n |
20 |
20 |
2 | ||
n+
|
1 |
9 |
1 |
9 |
1 |
(3n-2)(3n+1) |
n |
an+1-an |
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