Average Error: 0.0 → 0.0
Time: 310.0ms
Precision: 64
\[\frac{x + 1}{1 - x}\]
↓
\[\frac{x + 1}{1 - x}\]
\frac{x + 1}{1 - x}
↓
\frac{x + 1}{1 - x}
double f(double x) {
        double r32801 = x;
        double r32802 = 1.0;
        double r32803 = r32801 + r32802;
        double r32804 = r32802 - r32801;
        double r32805 = r32803 / r32804;
        return r32805;
}
↓
double f(double x) {
        double r32806 = x;
        double r32807 = 1.0;
        double r32808 = r32806 + r32807;
        double r32809 = r32807 - r32806;
        double r32810 = r32808 / r32809;
        return r32810;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{x + 1}{1 - x}\]

  2. Final simplification0.0

    \[\leadsto \frac{x + 1}{1 - x}\]

Reproduce

herbie shell --seed 2020020 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))