Average Error: 0.0 → 0.0
Time: 3.8s
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 r8538 = 1.0;
        double r8539 = x;
        double r8540 = r8538 / r8539;
        double r8541 = r8540 - r8538;
        double r8542 = log(r8541);
        double r8543 = -r8542;
        return r8543;
}
↓
double f(double x) {
        double r8544 = 1.0;
        double r8545 = x;
        double r8546 = r8544 / r8545;
        double r8547 = r8546 - r8544;
        double r8548 = log(r8547);
        double r8549 = -r8548;
        return r8549;
}

Error

Bits error versus x

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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 2019120 
(FPCore (x)
  :name "neg log"
  (- (log (- (/ 1 x) 1))))