| 2 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||
= | (1+ | * | +...+ | * | + | * | )− | |||||||
| 3 | 3 | 9 | 2(n−1)+1 | 9n−1 | 2n+1 | 9n |
| 2 | 1 | 1 | 1 | 1 | ||||||
− | (1+ | * | +...+ | * | )= | |||||
| 3 | 3 | 9 | 2(n−1)+1 | 9n−1 |
| 2 | 1 | 1 | ||||
= | ( | * | ) | |||
| 3 | 2n+1 | 9n |
| 2 | ||
r1= | ||
| 81 |
| 2 | 1 | 1 | ||||
rn= | ( | * | )= | |||
| 3 | 2n+1 | 9n |
| 2n−1 | 1 | 2 | 1 | 1 | ||||||
=( | * | )* | ( | * | )= | |||||
| 2n+1 | 9 | 3 | 2(n−1)+1 | 9n−1 |
| 2n−1 | ||
= | *rn−1 dla n>1 | |
| 9(2n+1) |