Question

I GIVE GOLD MEDAL! (:
The first four terms of a sequence is shown below.
9, 5, 1, -3
which of the following functions best defines this sequence?

Answer 1

f(x)_1 = 9
f(x)_2 = f(x)_1 - 4
so your sequence will be 9, 5, 1, -3, -7, -11...

Answer 2

so it'll be f(1) = 9, f( n + 1 ) = f(n) - 4, for n > 1 ? @Matt.Mawson

Answer 3

correct!

Answer 4

okay thank you!

Answer 5

Thanks, that was fun (-: