Average Error: 0.0 → 0.0
Time: 31.5s
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 r31221 = x;
        double r31222 = 1.0;
        double r31223 = r31221 + r31222;
        double r31224 = r31222 - r31221;
        double r31225 = r31223 / r31224;
        return r31225;
}
↓
double f(double x) {
        double r31226 = x;
        double r31227 = 1.0;
        double r31228 = r31226 + r31227;
        double r31229 = r31227 - r31226;
        double r31230 = r31228 / r31229;
        return r31230;
}

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 2019202 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1) (- 1 x)))