Average Error: 0.0 → 0.0
Time: 1.4s
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 r2382 = 1.0;
        double r2383 = x;
        double r2384 = r2382 / r2383;
        double r2385 = r2384 - r2382;
        double r2386 = log(r2385);
        double r2387 = -r2386;
        return r2387;
}
↓
double f(double x) {
        double r2388 = 1.0;
        double r2389 = x;
        double r2390 = r2388 / r2389;
        double r2391 = r2390 - r2388;
        double r2392 = log(r2391);
        double r2393 = -r2392;
        return r2393;
}

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 2019354 
(FPCore (x)
  :name "neg log"
  :precision binary64
  (- (log (- (/ 1 x) 1))))