Average Error: 0.0 → 0.0
Time: 772.0ms
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 r36175 = x;
        double r36176 = 1.0;
        double r36177 = r36175 + r36176;
        double r36178 = r36176 - r36175;
        double r36179 = r36177 / r36178;
        return r36179;
}
↓
double f(double x) {
        double r36180 = x;
        double r36181 = 1.0;
        double r36182 = r36180 + r36181;
        double r36183 = r36181 - r36180;
        double r36184 = r36182 / r36183;
        return r36184;
}

Error

Bits error versus x

Try it out

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 2020065 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))