Average Error: 0.0 → 0.0
Time: 5.3s
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 r1528151 = x;
        double r1528152 = 1.0;
        double r1528153 = r1528151 + r1528152;
        double r1528154 = r1528152 - r1528151;
        double r1528155 = r1528153 / r1528154;
        return r1528155;
}
↓
double f(double x) {
        double r1528156 = 1.0;
        double r1528157 = x;
        double r1528158 = r1528156 + r1528157;
        double r1528159 = r1528156 - r1528157;
        double r1528160 = r1528158 / r1528159;
        return r1528160;
}

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 2019163 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))