| ⎧ | 4=a1+(6−1)*r | |
| ⎩ | 10=a1+(16−1)*r |
| ⎧ | 4=a1+5r | |
| ⎩ | 10=a1+15r |
| 6 | ||
r= | ||
| 10 |
| 6 | ||
4=a1+5* | ||
| 10 |
| 6 | 18 | |||
a16 =1+(16−1)* | =−1+ | =−1+9=8
| ||
| 10 | 2 |
| 6 | ||
an=−1+(n−1)* | ||
| 10 |
| 3 | 6 | 3 | ||||
an = 1 + (n − 1) * | [ | = | ] | |||
| 5 | 10 | 5 |
| 10 − 4 | ||
r = | = 0,6 an = 4 + 0,6*(n − 6} ⇒ an = 0,6n + 0,4 | |
| 16 − 6 |