4 years ago

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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