Average Error: 0.0 → 0.0
Time: 9.0s
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 r1283034 = x;
        double r1283035 = 1.0;
        double r1283036 = r1283034 + r1283035;
        double r1283037 = r1283035 - r1283034;
        double r1283038 = r1283036 / r1283037;
        return r1283038;
}
↓
double f(double x) {
        double r1283039 = 1.0;
        double r1283040 = x;
        double r1283041 = r1283039 + r1283040;
        double r1283042 = r1283039 - r1283040;
        double r1283043 = r1283041 / r1283042;
        return r1283043;
}

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 2019168 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))