The product of the first and the third terms of an arithmetic sequence is 9. If all terms of the sequence are positive integers, what is the fourth term?

Guest May 1, 2021

#1

#3**+1 **

the answer is 13 because multiples of 9 are 1,3 and 9, so the first and third terms are 1 and 9

so the second term is 5, +4 is nine, +4 is 13

mathisopandcool
May 1, 2021

#4