Which of these is the Binet formula for the nnn-th Fibonacci number?
Fn=fracphin−psinsqrt5F_n = \\frac{\\phi^n - \\psi^n}{\\sqrt{5}}Fn=fracphin−psinsqrt5
Fn=phin+psinF_n = \\phi^n + \\psi^nFn=phin+psin
Fn=2n−1F_n = 2^n - 1Fn=2n−1
Fn=n!F_n = n!Fn=n!