Average Error: 0.0 → 0.0
Time: 3.8s
Precision: 64
\[\frac{x + 1}{1 - x}\]
↓
\[\frac{1 + x}{1 - x}\]
\frac{x + 1}{1 - x}
↓
\frac{1 + x}{1 - x}
double f(double x) {
        double r16794 = x;
        double r16795 = 1.0;
        double r16796 = r16794 + r16795;
        double r16797 = r16795 - r16794;
        double r16798 = r16796 / r16797;
        return r16798;
}
↓
double f(double x) {
        double r16799 = 1.0;
        double r16800 = x;
        double r16801 = r16799 + r16800;
        double r16802 = r16799 - r16800;
        double r16803 = r16801 / r16802;
        return r16803;
}

Error

Bits error versus x

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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

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

Reproduce

herbie shell --seed 2019179 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))