Average Error: 41.1 → 0.2
Time: 5.0s
Precision: binary64
\[\sqrt{\frac{e^{2 \cdot x} - 1}{e^{x} - 1}} \]
↓
\[\sqrt{\log \left(\sqrt{e} \cdot \left(\sqrt{e} \cdot e^{e^{x}}\right)\right)} \]
\sqrt{\frac{e^{2 \cdot x} - 1}{e^{x} - 1}}
↓
\sqrt{\log \left(\sqrt{e} \cdot \left(\sqrt{e} \cdot e^{e^{x}}\right)\right)}

(FPCore (x)
 :precision binary64
 (sqrt (/ (- (exp (* 2.0 x)) 1.0) (- (exp x) 1.0))))
↓
(FPCore (x)
 :precision binary64
 (sqrt (log (* (sqrt E) (* (sqrt E) (exp (exp x)))))))
double code(double x) {
	return sqrt((exp(2.0 * x) - 1.0) / (exp(x) - 1.0));
}
↓
double code(double x) {
	return sqrt(log(sqrt((double) M_E) * (sqrt((double) M_E) * exp(exp(x)))));
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 41.1

    \[\sqrt{\frac{e^{2 \cdot x} - 1}{e^{x} - 1}} \]

  2. Simplified0.0

    \[\leadsto \color{blue}{\sqrt{1 + e^{x}}} \]

  3. Applied add-log-exp_binary640.2

    \[\leadsto \sqrt{1 + \color{blue}{\log \left(e^{e^{x}}\right)}} \]

  4. Applied add-log-exp_binary640.2

    \[\leadsto \sqrt{\color{blue}{\log \left(e^{1}\right)} + \log \left(e^{e^{x}}\right)} \]

  5. Applied sum-log_binary640.2

    \[\leadsto \sqrt{\color{blue}{\log \left(e^{1} \cdot e^{e^{x}}\right)}} \]

  6. Applied add-sqr-sqrt_binary640.2

    \[\leadsto \sqrt{\log \left(\color{blue}{\left(\sqrt{e^{1}} \cdot \sqrt{e^{1}}\right)} \cdot e^{e^{x}}\right)} \]

  7. Applied associate-*l*_binary640.2

    \[\leadsto \sqrt{\log \color{blue}{\left(\sqrt{e^{1}} \cdot \left(\sqrt{e^{1}} \cdot e^{e^{x}}\right)\right)}} \]

  8. Simplified0.2

    \[\leadsto \sqrt{\log \left(\sqrt{e^{1}} \cdot \color{blue}{\left(e^{e^{x}} \cdot \sqrt{e}\right)}\right)} \]

  9. Final simplification0.2

    \[\leadsto \sqrt{\log \left(\sqrt{e} \cdot \left(\sqrt{e} \cdot e^{e^{x}}\right)\right)} \]

Reproduce

herbie shell --seed 2022039 
(FPCore (x)
  :name "sqrtexp (problem 3.4.4)"
  :precision binary64
  (sqrt (/ (- (exp (* 2.0 x)) 1.0) (- (exp x) 1.0))))