What is the limit of the ratio Fn+1Fn\frac{F_{n+1}}{F_n}FnFn+1 as n→∞n \to \inftyn→∞ for Fibonacci numbers?
2\sqrt{2}2
ϕ≈1.618\phi \approx 1.618ϕ≈1.618
222
π2\frac{\pi}{2}2π