Question

What are the explicit equation and domain for an arithmetic sequence with a first term of 8 and a second term of 5?

Answer 1

is it multiple choice

Answer 2

We need a1 - The first term
We need d - The common difference.

Answer 3

@gabbimanges17

Answer 4

an = 8 − 5(n − 1); all integers where n ≥ 1
an = 8 − 5(n − 1); all integers where n ≥ 0
an = 8 − 3(n − 1); all integers where n ≥ 1
an = 8 − 3(n − 1); all integers where n ≥ 0

Answer 5

@_greatmath7

Answer 6

How much did the value change from the first value to the second value?

Answer 7

-3

Answer 8

First term = 8
Common difference = 5−8 = −3

an = 8 − 3(n − 1); all integers where n ≥ 1

Answer 9

Good. Throw out the two that say "-5".

Answer 10

-5

Answer 11

That's right. Throw those out. The common difference is -3. A formula with "-5" can't do that. Scratch them out and never look at them again. Focus on the ones with "-3".