Average Error: 0.0 → 0.0
Time: 11.4s
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 r249255 = 1.0;
        double r249256 = x;
        double r249257 = r249255 / r249256;
        double r249258 = r249257 - r249255;
        double r249259 = log(r249258);
        double r249260 = -r249259;
        return r249260;
}
↓
double f(double x) {
        double r249261 = 1.0;
        double r249262 = x;
        double r249263 = r249261 / r249262;
        double r249264 = r249263 - r249261;
        double r249265 = log(r249264);
        double r249266 = -r249265;
        return r249266;
}

Error

Bits error versus x

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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 2019119 
(FPCore (x)
  :name "neg log"
  (- (log (- (/ 1 x) 1))))