Question

Someone help me please! The following function defines a recursive sequence:

f(0) = -5

f(1) = 20

f(n) = -4•f(n -1) - 3•f(n - 2); for n > 1

Which of the following sequences is defined by this recursive function?

-5, -20, -65, -200, …

-5, 20, -92, 372, …

-5, -24, -92, -372, …

-5, 20, -65, 200, …

Answer 1

Let the function be f(x)
If x = 2,
then f(2) = -4.f(2-1) - 3.f(n-2)
=> f(2) = -4.(20) - 3.(-5)
= -80 + 15
= -65

Answer 2

Understand how you do it? @kame324

Answer 3

Kind of.. so it could be either a or d @Brainybeauty

Answer 4

Yes so can you try to find the next term by the same method? I'm here if you need help
Just try to do it yourself first :)

Answer 5

@kame324