Average Error: 0.0 → 0.0
Time: 3.2s
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 r33445 = x;
        double r33446 = 1.0;
        double r33447 = r33445 + r33446;
        double r33448 = r33446 - r33445;
        double r33449 = r33447 / r33448;
        return r33449;
}
↓
double f(double x) {
        double r33450 = x;
        double r33451 = 1.0;
        double r33452 = r33450 + r33451;
        double r33453 = r33451 - r33450;
        double r33454 = r33452 / r33453;
        return r33454;
}

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 2019291 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))