Average Error: 0.0 → 0.0
Time: 940.0ms
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 r23212 = x;
        double r23213 = 1.0;
        double r23214 = r23212 + r23213;
        double r23215 = r23213 - r23212;
        double r23216 = r23214 / r23215;
        return r23216;
}
↓
double f(double x) {
        double r23217 = x;
        double r23218 = 1.0;
        double r23219 = r23217 + r23218;
        double r23220 = r23218 - r23217;
        double r23221 = r23219 / r23220;
        return r23221;
}

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 2020034 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))