Prove the following properties of the Fibonacci sequence using the proof method spec- ified: (a)Fn = 5Fn−4 + 3Fn−5, for n ≥ 6 using a direct proof. (b) F1 + F2 + F3 + · · · + Fn = Fn+2 − 1 using a proof by induction

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Chapter1: Introduction
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Prove the following properties of the Fibonacci sequence using the proof method spec-
ified:
(a)Fn = 5Fn−4 + 3Fn−5, for n ≥ 6 using a direct proof.

(b) F1 + F2 + F3 + · · · + Fn = Fn+2 − 1 using a proof by induction

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