Fn+3 = Fn+1 + Fn + Fn+1?

But how is this used with 1/2(Fn+3 - Fn)?

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- November 1st 2012, 06:46 AMArkiousRe: Fibonacci Sequence question
Fn+3 = Fn+1 + Fn + Fn+1?

But how is this used with 1/2(Fn+3 - Fn)? - November 1st 2012, 07:28 AMa tutorRe: Fibonacci Sequence question
- November 1st 2012, 08:29 PMSalahuddin559Re: Fibonacci Sequence question
Hi Arkious,

please do not double post. Please contact your algebra teacher or learn from some websites teaching algebra, if you have trouble with these things.

Salahuddin

Maths online - November 2nd 2012, 10:48 AMArkiousRe: Fibonacci Sequence question
when did i double post???

anways, im assuming you guys had as much trouble as i did, as when my tutor replied to me telling me that by showing Fn+1 = 1/2(Fn+3 - Fn) is the final answer and all i needed to do was work it out.

If i had have known that in the 1st place i would have been looking at this question in a completely different way. - November 2nd 2012, 11:22 AMArkiousRe: Fibonacci Sequence question
So, Fn+1 = 1/2(Fn+3 - Fn). By rearranging;

Fn+3 = Fn+2 + Fn+1

(Fn+1 + Fn) + Fn+1

Fn+3 = 2Fn+1 + Fn

To prove this, if Fn = 5;

8 = 1/2(21 - 5)

8 = 1/2(16) - November 2nd 2012, 11:30 AMa tutorRe: Fibonacci Sequence question
- November 2nd 2012, 11:37 AMArkiousRe: Fibonacci Sequence question
that wasnt meant to be a dig at you as you took it. not all of us have the same mathematical skills as some hence im trying to get my head round this.

i implyed that you had trouble as really, if i had have known that all i was looking for was proving Fn+1 = 1/2(Fn+3 - Fn), then thats all you would have said.

I thankyou for your help, but did not mean to insult your intellegence, i merely thought you missunderstud it like i did.

But 'the good news' is that i now know how unintellegent i am as my problems are 'so difficult' - November 2nd 2012, 12:02 PMa tutorRe: Fibonacci Sequence question
Sorry about the sarcasm.

I've been trying to help you make small steps towards understanding your problem and I was rather surprised that you thought I didn't understand it.

Never mind.