📝 Test if a Number belongs to the Fibonacci Series
A positive integer ω is a Fibonacci number if and only one of:
🔸 5ω^2 + 4 and
🔸 5ω^2 - 4
is a perfect square or a square number.
A square number is the result when a number has been multiplied by itself.
A positive integer ω is a Fibonacci number if and only one of:
🔸 5ω^2 + 4 and
🔸 5ω^2 - 4
is a perfect square or a square number.
A square number is the result when a number has been multiplied by itself.