Average Error: 0.0 → 0.0
Time: 5.9s
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 r23634 = x;
        double r23635 = 1.0;
        double r23636 = r23634 + r23635;
        double r23637 = r23635 - r23634;
        double r23638 = r23636 / r23637;
        return r23638;
}
↓
double f(double x) {
        double r23639 = x;
        double r23640 = 1.0;
        double r23641 = r23639 + r23640;
        double r23642 = r23640 - r23639;
        double r23643 = r23641 / r23642;
        return r23643;
}

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 2019322 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))