\[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
Test:
NMSE problem 3.3.4
Bits:
128 bits
Bits error versus x
Time: 11.0 s
Input Error: 13.2
Output Error: 13.3
Log:
Profile: 🕒
\({\left(\sqrt[3]{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)}}\right)}^3 - {e}^{\left(\frac{\log x}{3}\right)}\)
  1. Started with
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
    13.2
  2. Using strategy rm
    13.2
  3. Applied pow-to-exp to get
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - \color{red}{{x}^{\left(\frac{1}{3}\right)}} \leadsto {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - \color{blue}{e^{\log x \cdot \frac{1}{3}}}\]
    13.5
  4. Applied simplify to get
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - e^{\color{red}{\log x \cdot \frac{1}{3}}} \leadsto {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - e^{\color{blue}{\frac{\log x}{3}}}\]
    13.2
  5. Using strategy rm
    13.2
  6. Applied *-un-lft-identity to get
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - e^{\color{red}{\frac{\log x}{3}}} \leadsto {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - e^{\color{blue}{1 \cdot \frac{\log x}{3}}}\]
    13.2
  7. Applied exp-prod to get
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - \color{red}{e^{1 \cdot \frac{\log x}{3}}} \leadsto {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - \color{blue}{{\left(e^{1}\right)}^{\left(\frac{\log x}{3}\right)}}\]
    13.2
  8. Applied simplify to get
    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {\color{red}{\left(e^{1}\right)}}^{\left(\frac{\log x}{3}\right)} \leadsto {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {\color{blue}{e}}^{\left(\frac{\log x}{3}\right)}\]
    13.2
  9. Using strategy rm
    13.2
  10. Applied add-cube-cbrt to get
    \[\color{red}{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)}} - {e}^{\left(\frac{\log x}{3}\right)} \leadsto \color{blue}{{\left(\sqrt[3]{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)}}\right)}^3} - {e}^{\left(\frac{\log x}{3}\right)}\]
    13.3

Original test:


(lambda ((x default))
  #:name "NMSE problem 3.3.4"
  (- (pow (+ x 1) (/ 1 3)) (pow x (/ 1 3))))