Question

If a2 = 5 and a8 = 35, what is the value of a30?

Answer 1

a(30) = 145

Explanation:

a(n) = a(1) + (n-1)d

d = 5

a(30) = 0 + (30-1)5

a(30) = 0 + (29)5

a(30) = 0 + 145

a(30) = 145