Average Error: 0.0 → 0.0
Time: 3.4s
Precision: binary64
\[\frac{-\left(f + n\right)}{f - n}\]
↓
\[\sqrt[3]{\frac{f + n}{n - f} \cdot \left(\frac{f + n}{n - f} \cdot \frac{f + n}{n - f}\right)}\]
\frac{-\left(f + n\right)}{f - n}
↓
\sqrt[3]{\frac{f + n}{n - f} \cdot \left(\frac{f + n}{n - f} \cdot \frac{f + n}{n - f}\right)}
(FPCore (f n) :precision binary64 (/ (- (+ f n)) (- f n)))
↓
(FPCore (f n)
 :precision binary64
 (cbrt (* (/ (+ f n) (- n f)) (* (/ (+ f n) (- n f)) (/ (+ f n) (- n f))))))
double code(double f, double n) {
	return -(f + n) / (f - n);
}
↓
double code(double f, double n) {
	return cbrt(((f + n) / (n - f)) * (((f + n) / (n - f)) * ((f + n) / (n - f))));
}

Error

Bits error versus f

Bits error versus n

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{-\left(f + n\right)}{f - n}\]

  2. Simplified0.0

    \[\leadsto \color{blue}{\frac{f + n}{n - f}}\]
  3. Using strategy rm

  4. Applied add-cbrt-cube_binary640.0

    \[\leadsto \color{blue}{\sqrt[3]{\left(\frac{f + n}{n - f} \cdot \frac{f + n}{n - f}\right) \cdot \frac{f + n}{n - f}}}\]

  5. Final simplification0.0

    \[\leadsto \sqrt[3]{\frac{f + n}{n - f} \cdot \left(\frac{f + n}{n - f} \cdot \frac{f + n}{n - f}\right)}\]

Reproduce

herbie shell --seed 2021019 
(FPCore (f n)
  :name "subtraction fraction"
  :precision binary64
  (/ (- (+ f n)) (- f n)))