Question

Which is a recursive formula for the sequence 50, 54, 58, 62, …?

A. an=4n+46
B. {a1=50an=an−1+4, where n≥2
C. an=4n+50
D. {a1=46an=an−1+4, where n≥2

Answer 1

A

Explanation:

common difference d = 4

nth term = a₁ + (n-1)d

= 50 + (n-1)4

= 50 + 4n-4

= 46 + 4n