Question

1. Use the sequence to answer the questions. 2.5, 6, 9.5, 13, 16.5, 20,… (a) What is the common difference? (b) What is the recursive rule for the sequence?

Answer 1

common difference = 6 - 2.5 = 3.5

(B) recursive formula can be written as
U(n+1) = U(n) + 3.5n
where value of n is 0 to infinity