Average Error: 0.0 → 0.0
Time: 4.8s
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 r12128 = 1.0;
        double r12129 = x;
        double r12130 = r12128 / r12129;
        double r12131 = r12130 - r12128;
        double r12132 = log(r12131);
        double r12133 = -r12132;
        return r12133;
}
↓
double f(double x) {
        double r12134 = 1.0;
        double r12135 = x;
        double r12136 = r12134 / r12135;
        double r12137 = r12136 - r12134;
        double r12138 = log(r12137);
        double r12139 = -r12138;
        return r12139;
}

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 2020042 
(FPCore (x)
  :name "neg log"
  :precision binary64
  (- (log (- (/ 1 x) 1))))