Average Error: 0.0 → 0.0
Time: 1.7s
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 r50511 = x;
        double r50512 = 1.0;
        double r50513 = r50511 + r50512;
        double r50514 = r50512 - r50511;
        double r50515 = r50513 / r50514;
        return r50515;
}
↓
double f(double x) {
        double r50516 = x;
        double r50517 = 1.0;
        double r50518 = r50516 + r50517;
        double r50519 = r50517 - r50516;
        double r50520 = r50518 / r50519;
        return r50520;
}

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

    \[\frac{x + 1}{1 - x}\]

  2. Final simplification0.0

    \[\leadsto \frac{x + 1}{1 - x}\]

Reproduce

herbie shell --seed 2020021 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))