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Lady_Fox [76]
4 years ago
11

A recursive rule for an arithmetic sequence is a1=-2; an=an-1 -9

Mathematics
1 answer:
maksim [4K]4 years ago
5 0

Answer:

a_n = -9n +7 \,,\,\,\,n\geq1

Step-by-step explanation:

This is an arithmetic sequence with a common difference of -9. We use this fact to create an explicit rule:

a_n = -2 - 9(n-1)= -2 -9n +9 = -9n +7 \,,\,\,\,n\geq1

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