Answer:
D
Step-by-step explanation:
an = 7 - 3(n - 1)
= 7 -3n - 1 *(-3)
= 7 - 3n + 3 {Combine like terms}
= 7 + 3 - 3n
= 10 - 3n
= -3n + 10
I think this is right...
First, you have to distribute -3 by order of operations
you should get 7 - 3n + 3.
Simplify and get f(n) = -3n+10
