Course Solutions Uncategorized (Solved) : 5 Let Fibonacci Sequence Find Closed Formula First Show B Show 3 C Solve Recurrence Rel Q32707331 . . . .

(Solved) : 5 Let Fibonacci Sequence Find Closed Formula First Show B Show 3 C Solve Recurrence Rel Q32707331 . . . .

 

5. Let F_{n} be the Fibonacci sequence. That is, F_{n}=F_{n-1}+F_{n-2} , with F_{o}=0, F_{1}=1 . Find a closed formula for s_{n}=sum_{k=0}^{n}2^{n-k}F_{k} .

(a) First, show that s_{n+1}-2s_{n}=F_{n+1} .

(b) Now show that s_{n}=3s_{n-1}-s_{n-2}-2s_{n-3} for n ≥ 3.

(c) Solve the recurrence relation to get a closed formula fors_{n}.

note: discrete math

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