Question

Given the arithmetic sequence A1, A2, A3, A4, 20, 29, 38, 47
What is the value of A35?

Answer 1

20,29,38,47

an = a1 + (n - 1) * d
n = term to find = 35
a1 = 1st term = 20
d = common difference = 9

a(35) = 20 + (35 - 1) * 9
a(35) = 20 + 34 * 9
a(35) = 20 + 306
a(35) = 326 <==