Question

Could someone please help? Will give out medal!

Find f(5) for this sequence:

f(1) = 2 and f(2) = 3, f(n) = f(1) + f(2) + f(n - 1), for n > 2.

f(5) = ______

Answer 1

be specific about what kind of series are you asking?

Answer 2

Thats everything the question asks

Answer 3

Find f(3), then f(4) and then f(5).

Answer 4

are there any options....? f(5)=2048

Answer 5

Its a fill in the blank question

Answer 6

Nope...

f(3) = f(1) + f(2) + f(2) = 2 + 3 + 3 = 8
f(4) = f(1) + f(2) + f(3) = 2 + 3 + 8 = 13
f(5) = f(1) + f(2) + f(4) = 2 + 3 + 13 = 18

Answer 7

yeah right dude.. that's the answer 18

Answer 8

So you know that f(1) = 2 and f(2) =3
In order to calculate f(5) you say that n=5 so :
f(5) = f(1) + f(2) + f(4)
You don't know the value of f(4), and you must calculate it :
f(4) = f(1) + f(2) + f(3)
You dont know the value of f(3) , so you need to calculate it also:
f(3) = f(1) + f(2) + f(2) = 2 + 3 + 3 =8
So f(4) = 2 + 3 + 8 = 13
AND
So f(5) = 2 + 3 + 13 = 18