Average Error: 0.0 → 0.0
Time: 11.3s
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 r34773 = x;
        double r34774 = 1.0;
        double r34775 = r34773 + r34774;
        double r34776 = r34774 - r34773;
        double r34777 = r34775 / r34776;
        return r34777;
}
↓
double f(double x) {
        double r34778 = x;
        double r34779 = 1.0;
        double r34780 = r34778 + r34779;
        double r34781 = r34779 - r34778;
        double r34782 = r34780 / r34781;
        return r34782;
}

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

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

Reproduce

herbie shell --seed 2019325 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))