Bài 28

import math

n = int(input("Nhap so hang n: "))

fib = [0, 1, 1]
for i in range(3, n + 1):
    fib.append(fib[-1] + fib[-2])

print("Day Fibonacci:")
for i in range(1, n + 1):
    print(f"  F({i}) = {fib[i]}")

phi = (1 + math.sqrt(5)) / 2
print(f"\nTi le vang phi = {round(phi, 8)}")
print(f"\nTi so F(k+1)/F(k) (10 so hang cuoi):")
for i in range(max(2, n-9), n + 1):
    ti_so = fib[i] / fib[i-1]
    print(f"  F({i})/F({i-1}) = {fib[i]}/{fib[i-1]} = {round(ti_so, 8)}")