Question

2.

Which explicit rule represents the sequence
below?
5
31 28
31 28 25 22 19
Position, n 1 2 3 4
Term, f(n)
A f(n) = 31+ 3(n) for n>0
B f(n)=31-3(n) for n>0
f(n)=31+ 3(n − 1) for n>0
-
f(n)=31-3(n − 1) for n > 0

Answer 1

Answer: D

Explanation:

term is subtracted by 3 as the position changes

if we do B f(1) = 31 - 3(1) = 28 which does not equal 31

D is f(1) = 31 - 3(1-1) <- 3(0)

= 31