Average Error: 14.5 → 0.1
Time: 24.7s
Precision: 64
\[\frac{1}{x + 1} - \frac{1}{x}\]
↓
\[\frac{\frac{-1}{x}}{x + 1}\]
\frac{1}{x + 1} - \frac{1}{x}
↓
\frac{\frac{-1}{x}}{x + 1}
double f(double x) {
        double r2119026 = 1.0;
        double r2119027 = x;
        double r2119028 = r2119027 + r2119026;
        double r2119029 = r2119026 / r2119028;
        double r2119030 = r2119026 / r2119027;
        double r2119031 = r2119029 - r2119030;
        return r2119031;
}
↓
double f(double x) {
        double r2119032 = -1.0;
        double r2119033 = x;
        double r2119034 = r2119032 / r2119033;
        double r2119035 = 1.0;
        double r2119036 = r2119033 + r2119035;
        double r2119037 = r2119034 / r2119036;
        return r2119037;
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 14.5

    \[\frac{1}{x + 1} - \frac{1}{x}\]
  2. Using strategy rm

  3. Applied frac-sub13.9

    \[\leadsto \color{blue}{\frac{1 \cdot x - \left(x + 1\right) \cdot 1}{\left(x + 1\right) \cdot x}}\]

  4. Simplified0.3

    \[\leadsto \frac{\color{blue}{-1}}{\left(x + 1\right) \cdot x}\]

  5. Simplified0.3

    \[\leadsto \frac{-1}{\color{blue}{x \cdot x + x}}\]
  6. Using strategy rm

  7. Applied *-un-lft-identity0.3

    \[\leadsto \frac{-1}{x \cdot x + \color{blue}{1 \cdot x}}\]

  8. Applied distribute-rgt-out0.3

    \[\leadsto \frac{-1}{\color{blue}{x \cdot \left(x + 1\right)}}\]

  9. Applied associate-/r*0.1

    \[\leadsto \color{blue}{\frac{\frac{-1}{x}}{x + 1}}\]

  10. Final simplification0.1

    \[\leadsto \frac{\frac{-1}{x}}{x + 1}\]

Reproduce

herbie shell --seed 2019125 
(FPCore (x)
  :name "2frac (problem 3.3.1)"
  (- (/ 1 (+ x 1)) (/ 1 x)))