Question

Help, I'll fan and medal
What are the explicit equation and domain for an arithmetic sequence with a first term of 5 and a second term of 3?

Answer 1

Answers:
an = 5 − 3(n − 1); all integers where n ≥ 1
an = 5 − 3(n − 1); all integers where n ≥ 0
an = 5 − 2(n − 1); all integers where n ≥ 0
an = 5 − 2(n − 1); all integers where n ≥ 1

Answer 2

@mathmate

Answer 3

@agent0smith

Answer 4

So we're given that the arithmetic sequence is
{5,3,1,-1,-3,-5,...}
Can you identify the common difference? This is important in finding the domain.

Answer 5

Umm, that those are negative? @mathmate

Answer 6

I'm confused with this question

Answer 7

Common difference can be a negative number, which means that the sequence becomes progressively smaller.
This question essentially asks you to find the general term (the \(n^{th}\) term of the sequence.

If you are not familiar with how to find the general term of an arithmetic sequence, the following link gives a very easy-to-read explanation of how you can do that, with examples:
https://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html

or read more here:
http://www.mathcentre.ac.uk/resources/uploaded/mc-ty-apgp-2009-1.pdf