The general formula: 2 / 1, 3 / 2, 5 / 3, 8 / 5, 13 / 8, 21 / 13

The general formula: 2 / 1, 3 / 2, 5 / 3, 8 / 5, 13 / 8, 21 / 13

This formula is about the formula of Fibonacci sequence. It is very simple. We can see such a rule: the molecule of the latter formula is obtained from the molecule of the former formula plus the denominator of the latter formula. From the general formula of Fibonacci sequence, we can see that both the molecule and denominator are related to a general formula of Fibonacci sequence