This formula is attributed to Binet (1843). See https://math.temple.edu/~reich/Fib/fibo.html https://math.temple.edu/~reich/Fib/fibo.html for more on the Fibon

This formula is attributed to Binet (1843). See https://math.temple.edu/~reich/Fib/fibo.html https://math.temple.edu/~reich/Fib/fibo.html for more on the Fibonacci sequence and the golden mean.