# Wow!

Calculus Level 3

define $${ a }_{ n }$$ recursively as $${ a }_{ n-1 }+{ a }_{ n-2 }$$ (the Fibonacci sequence)

the first few terms are :1,1,2,3....

find the $$\lim _{ n\rightarrow \infty }{ \frac { { a }_{ n+1 } }{ { a }_{ n} } }$$

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