Average Error: 0.0 → 0.0
Time: 8.3s
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 r48143 = x;
        double r48144 = 1.0;
        double r48145 = r48143 + r48144;
        double r48146 = r48144 - r48143;
        double r48147 = r48145 / r48146;
        return r48147;
}
↓
double f(double x) {
        double r48148 = x;
        double r48149 = 1.0;
        double r48150 = r48148 + r48149;
        double r48151 = r48149 - r48148;
        double r48152 = r48150 / r48151;
        return r48152;
}

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 2020047 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))