Average Error: 0.1 → 0.1
Time: 2.9s
Precision: binary64
\[\frac{{x}^{\left(a - 1\right)}}{x - 1}\]
↓
\[\frac{{x}^{\left(a - 1\right)}}{x - 1}\]
\frac{{x}^{\left(a - 1\right)}}{x - 1}
↓
\frac{{x}^{\left(a - 1\right)}}{x - 1}
double code(double x, double a) {
	return ((double) (((double) pow(x, ((double) (a - 1.0)))) / ((double) (x - 1.0))));
}
↓
double code(double x, double a) {
	return ((double) (((double) pow(x, ((double) (a - 1.0)))) / ((double) (x - 1.0))));
}

Error

Bits error versus x

Bits error versus a

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.1

    \[\frac{{x}^{\left(a - 1\right)}}{x - 1}\]

  2. Final simplification0.1

    \[\leadsto \frac{{x}^{\left(a - 1\right)}}{x - 1}\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x a)
  :name "(/ (pow x (- a 1)) (- x 1))"
  :precision binary64
  (/ (pow x (- a 1.0)) (- x 1.0)))