SOLUTION: If f(x) = 4x, and f(x + 2) – f(x) = k f(x), then what is the value of k?

Algebra ->  Functions -> SOLUTION: If f(x) = 4x, and f(x + 2) – f(x) = k f(x), then what is the value of k?       Log On


   

Question 1082381: If f(x) = 4x, and f(x + 2) – f(x) = k f(x), then what is the value of k?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x+%2B+2%29%96f%28x%29=kf%28x%29
4%28x%2B2%29-4x=k%2A4x
4x%2B8-4x=k%2A4x
8=k%2A4x
k=8%2F%284x%29
k=2%2Fx, expression; not a value