Finding Limit on 58(b): UGA Math 115 Homework #2

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SUMMARY

The discussion focuses on finding the limit of the sequence defined by \( a_n = \frac{F_n}{F_{n+1}} \), where \( F_n \) represents the Fibonacci sequence. A proposed method involves verifying the limit using mathematical induction and applying the closed-form expression for Fibonacci numbers, known as Binet's formula. The limit can be computed directly as \( \lim_{n\to \infty} a_n = \frac{1}{\phi} \), where \( \phi \) is the golden ratio, approximately 1.618.

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is there any other way to find the limit on 58(b). its on page 3 of the link.

http://www.math.uga.edu/~clayton/teaching/m115f09/homework/hw2solutions.pdf
 
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The only other way I can think of is to verify by induction that $a_n = F_n/F_{n+1}$ ($F_n$ denotes the $n$th term of the Fibonacci sequence), then use the identity

$F_n = \frac{1}{\sqrt{5}}\left\{\left(\frac{1+\sqrt{5}}{2}\right)^n - \left(\frac{1-\sqrt{5}}{2}\right)^n\right\}$

to compute $\lim_{n\to \infty} a_n$ directly.
 

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