Average Error: 0.0 → 0.0
Time: 2.0s
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 r26244 = x;
        double r26245 = 1.0;
        double r26246 = r26244 + r26245;
        double r26247 = r26245 - r26244;
        double r26248 = r26246 / r26247;
        return r26248;
}
↓
double f(double x) {
        double r26249 = x;
        double r26250 = 1.0;
        double r26251 = r26249 + r26250;
        double r26252 = r26250 - r26249;
        double r26253 = r26251 / r26252;
        return r26253;
}

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 2020036 +o rules:numerics
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))