how to solve the recursive function below

Question

Given the recursive function defined by 𝑓(1) = −3 and 𝑓(𝑛) = 2𝑓(𝑛 − 1) − 4 for all

integers 𝑛 ≥ 2, what is the value of 𝑓(4)?

Answer 1

You are given:

𝑓(1) = −3 and 𝑓(𝑛) = 2𝑓(𝑛 − 1) − 4 for all integers 𝑛 ≥ 2,

for n=2:

𝑓(2) = 2𝑓(1) − 4 = 2*(-3) − 4 = -10

for n=3:

𝑓(3) = 2𝑓(2) − 4 = ...

Hope that helps