Average Error: 0.0 → 0.0
Time: 4.9s
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 r9300 = 1.0;
        double r9301 = x;
        double r9302 = r9300 / r9301;
        double r9303 = r9302 - r9300;
        double r9304 = log(r9303);
        double r9305 = -r9304;
        return r9305;
}
↓
double f(double x) {
        double r9306 = 1.0;
        double r9307 = x;
        double r9308 = r9306 / r9307;
        double r9309 = r9308 - r9306;
        double r9310 = log(r9309);
        double r9311 = -r9310;
        return r9311;
}

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 2019208 
(FPCore (x)
  :name "neg log"
  :precision binary64
  (- (log (- (/ 1 x) 1))))