Question

71st term of 4, 13, 22, 31

Answer 1

634

Explanation:

Common difference: 9

number of terms (n) =71

nth term=aₙ

aₙ=9n-5

aₙ = 639 - 5

aₙ=634

Hope this helps!

Answer 2

a(77) = 4 + 630 = 634

Explanation:

This is an arithmetic sequence with first term 4 and common difference 9:

a(n) = a(1) + d(n - 1), or, specifically to this question, a(n) = 4 + 9(n - 1).

Then the 71st term is a(77) = 4 + 9(71 - 1), or a(77) = 4 + 630 = 634