Question

What is the correct formula for the following Arithmetic Sequence?
-4, -1, 2, 5, 8,…

Group of answer choices

an = 4 – 3(n – 1)


an = 4 + 3(n – 1)


an = -4 – 3(n – 1)


an = -4 + 3(n – 1)

Answer 1

Answer:

Concept: Arithmetic Sequence & Series

1. Notice the change is +3 for the first iteration and then +3 for the second iteration and so on
2. You must represent it a series.
3. Hence it must work for any nth variable
4. So we have -4+3(n-1)
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