What is the formula for the following arithmetic sequence? -9, -2, 5, 12, ... an = -9 + 7( n - 1) an = -9 + (-7)( n - 1) an = 7 + (-9)( n - 1) an = 9 + (-7)( n - 1)

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asked Nov 5, 2022 63.9k views

15 votes

What is the formula for the following arithmetic sequence?

-9, -2, 5, 12, ...

an = -9 + 7( n - 1)
an = -9 + (-7)( n - 1)
an = 7 + (-9)( n - 1)
an = 9 + (-7)( n - 1)

Mathematics
high-school

Erik Jhordan Rey asked

by Erik Jhordan Rey

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1 Answer

12 votes

Explanation:

an = -9 + 7(n-1)

because you start at -9 and go up by increments of 7

Chanakya Vadla answered Nov 11, 2022

by Chanakya Vadla

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