Created
January 5, 2019 17:51
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fibonacci number formula (untested)
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| double fib(int n) { | |
| const double sqrt5 = sqrt(5); | |
| const double phi_a = (1 + sqrt5)/2; | |
| const double phi_b = (1 - sqrt5)/2; | |
| return (pow(phi_a, n) - pow(phi_b, n))/sqrt5; | |
| } |
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