Average Error: 0.0 → 0.0
Time: 12.0s
Precision: 64
\[\frac{x + 1.0}{1.0 - x}\]
↓
\[\frac{1.0 + x}{1.0 - x}\]
\frac{x + 1.0}{1.0 - x}
↓
\frac{1.0 + x}{1.0 - x}
double f(double x) {
        double r2289421 = x;
        double r2289422 = 1.0;
        double r2289423 = r2289421 + r2289422;
        double r2289424 = r2289422 - r2289421;
        double r2289425 = r2289423 / r2289424;
        return r2289425;
}
↓
double f(double x) {
        double r2289426 = 1.0;
        double r2289427 = x;
        double r2289428 = r2289426 + r2289427;
        double r2289429 = r2289426 - r2289427;
        double r2289430 = r2289428 / r2289429;
        return r2289430;
}

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

    \[\frac{x + 1.0}{1.0 - x}\]

  2. Final simplification0.0

    \[\leadsto \frac{1.0 + x}{1.0 - x}\]

Reproduce

herbie shell --seed 2019162 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))