Question

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

common difference = second term - first term

Answer 2

explicit equation is an = a + (n - 1)d
where common difference = d and first term = a

Answer 3

I think it starts like a_n=5-2(n-1) right?

Answer 4

yes good job

Answer 5

now the domain is the possible value of the terms

Answer 6

listing the terms as the value odf d = -2
they are 5, 3, 1, -1, - 3......

Answer 7

the last part I need is whether or not it is all integers where n>0 or n>1

Answer 8

n starts from 1

so n > 0

Answer 9

alright thank you again!

Answer 10

yw