Average Error: 0.0 → 0.0
Time: 4.7s
Precision: 64
\[-\log \left(\frac{1}{x} - 1\right)\]
↓
\[-\log \left(\frac{1}{x} - 1\right)\]
-\log \left(\frac{1}{x} - 1\right)
↓
-\log \left(\frac{1}{x} - 1\right)
double f(double x) {
        double r11986 = 1.0;
        double r11987 = x;
        double r11988 = r11986 / r11987;
        double r11989 = r11988 - r11986;
        double r11990 = log(r11989);
        double r11991 = -r11990;
        return r11991;
}
↓
double f(double x) {
        double r11992 = 1.0;
        double r11993 = x;
        double r11994 = r11992 / r11993;
        double r11995 = r11994 - r11992;
        double r11996 = log(r11995);
        double r11997 = -r11996;
        return r11997;
}

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

    \[-\log \left(\frac{1}{x} - 1\right)\]

  2. Final simplification0.0

    \[\leadsto -\log \left(\frac{1}{x} - 1\right)\]

Reproduce

herbie shell --seed 2020042 
(FPCore (x)
  :name "neg log"
  :precision binary64
  (- (log (- (/ 1 x) 1))))