johnb1314 johnb1314

18-02-2021
Mathematics

contestada

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)

Respuesta :

18-02-2021

Step-by-step explanation:

an = -9 + 7(n-1)

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

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