Average Error: 32.4 → 32.4
Time: 1.9s
Precision: binary64
\[\sqrt{{x}^{4} - 1}\]
↓
\[\sqrt{{x}^{4} - 1}\]
\sqrt{{x}^{4} - 1}
↓
\sqrt{{x}^{4} - 1}
double code(double x) {
	return ((double) sqrt(((double) (((double) pow(x, 4.0)) - 1.0))));
}
↓
double code(double x) {
	return ((double) sqrt(((double) (((double) pow(x, 4.0)) - 1.0))));
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 32.4

    \[\sqrt{{x}^{4} - 1}\]

  2. Final simplification32.4

    \[\leadsto \sqrt{{x}^{4} - 1}\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(sqrt (- (pow x 4) 1))"
  :precision binary64
  (sqrt (- (pow x 4.0) 1.0)))