Average Error: 0.0 → 0.0
Time: 8.4s
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 r18454 = x;
        double r18455 = 1.0;
        double r18456 = r18454 + r18455;
        double r18457 = r18455 - r18454;
        double r18458 = r18456 / r18457;
        return r18458;
}
↓
double f(double x) {
        double r18459 = x;
        double r18460 = 1.0;
        double r18461 = r18459 + r18460;
        double r18462 = r18460 - r18459;
        double r18463 = r18461 / r18462;
        return r18463;
}

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 2019306 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))