; Exercise 1.13. Prove that Fib(n) is the closest integer to n/5, where = (1 + 5)/2.
; Hint: Let = (1 - 5)/2. Use induction and the definition of the Fibonacci numbers (see
; section 1.2.2) to prove that Fib(n) = (n - n)/5.
20 hours ago
my attempt to do the exercises in sicp.