Question

-3, 1, 5, 9, ...

Which function can be used to determine the nth term of the sequence?
A f(n) = n - 3
B. f(n) = n + 4
c. f(n) = 4n - 3
D. f(n) = 4n - 7

Answer 1

D

Explanation:

f(n) = -3 + (n - 1)·4

f(n) = -3 + 4n - 4

f(n) = 4n - 7

-3 derives from being the first number in the sequence

4 derives from being the positive difference between values in the sequence