How to prove that Fibonacci number is integer?
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The number $\frac{1}{\sqrt{5}}\left[\left(\frac{1+\sqrt{5}}{2}\right)^{n}-\left(\frac{1-\sqrt{5}}{2}\right)^n\right]$ is always an integer
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How to prove that a number is irrational
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Inductive proof of the closed formula for the Fibonacci sequence
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Proving that $\frac{\phi^{400}+1}{\phi^{200}}$ is an integer.
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Proof by induction: $n$th Fibonacci number is at most $ 2^n$
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How to prove $\sum_{k=1}^{n}F_k = F_{n+2}-1$ by induction when $F_n$ is the Fibonacci sequence
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Infinite Series: Fibonacci/ $2^n$
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Show that for any positive integer n, $(3n)!/(3!)^n$ is an integer.
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Fibonacci proof question: $f_{n+1}f_{n-1}-f_n^2=(-1)^n$
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Explanation of the Fibonacci sequence appearing in the result of 1 divided by 89?
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How does the fibonacci recursive function "work"?
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Fibonacci identity: $f_{n-1}f_{n+1} - f_{n}^2 = (-1)^n$
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Strong Induction Proof: Fibonacci number even if and only if 3 divides index
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How to prove the mathematical induction is true?
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Combinatorial proof that $\frac{({10!})!}{{10!}^{9!}}$ is an integer
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How to prove that $\frac{(mn)!}{m!(n!)^m}$ is an integer?
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Why does the Fibonacci Series start with 0, 1?