Average Error: 0.0 → 0.0
Time: 2.1s
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 r5475 = 1.0;
        double r5476 = x;
        double r5477 = r5475 / r5476;
        double r5478 = r5477 - r5475;
        double r5479 = log(r5478);
        double r5480 = -r5479;
        return r5480;
}
↓
double f(double x) {
        double r5481 = 1.0;
        double r5482 = x;
        double r5483 = r5481 / r5482;
        double r5484 = r5483 - r5481;
        double r5485 = log(r5484);
        double r5486 = -r5485;
        return r5486;
}

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 2020001 
(FPCore (x)
  :name "neg log"
  :precision binary64
  (- (log (- (/ 1 x) 1))))