Average Error: 30.1 → 0.5
Time: 1.2m
Precision: 64
Internal Precision: 1344
\[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
\[e^{(\left(-\log \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x} \cdot \sqrt[3]{x + 1}\right)\right)\right) \cdot 1 + \left(\log \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x} \cdot \sqrt[3]{x + 1}\right)\right)\right))_*} \cdot \frac{1}{(\left(\sqrt[3]{x + 1} + \sqrt[3]{x}\right) \cdot \left(\sqrt[3]{x}\right) + \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1}\right))_*}\]

Error

Bits error versus x

Derivation

  1. Initial program 30.1

    \[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
  2. Initial simplification30.1

    \[\leadsto \sqrt[3]{1 + x} - \sqrt[3]{x}\]
  3. Using strategy rm
  4. Applied add-exp-log30.1

    \[\leadsto \color{blue}{e^{\log \left(\sqrt[3]{1 + x} - \sqrt[3]{x}\right)}}\]
  5. Using strategy rm
  6. Applied flip3--30.1

    \[\leadsto e^{\log \color{blue}{\left(\frac{{\left(\sqrt[3]{1 + x}\right)}^{3} - {\left(\sqrt[3]{x}\right)}^{3}}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)}\right)}}\]
  7. Applied log-div30.1

    \[\leadsto e^{\color{blue}{\log \left({\left(\sqrt[3]{1 + x}\right)}^{3} - {\left(\sqrt[3]{x}\right)}^{3}\right) - \log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)}}\]
  8. Simplified2.6

    \[\leadsto e^{\color{blue}{\log 1} - \log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)}\]
  9. Using strategy rm
  10. Applied *-un-lft-identity2.6

    \[\leadsto e^{\log 1 - \color{blue}{1 \cdot \log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)}}\]
  11. Applied add-sqr-sqrt2.6

    \[\leadsto e^{\color{blue}{\sqrt{\log 1} \cdot \sqrt{\log 1}} - 1 \cdot \log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)}\]
  12. Applied prod-diff2.6

    \[\leadsto e^{\color{blue}{(\left(\sqrt{\log 1}\right) \cdot \left(\sqrt{\log 1}\right) + \left(-\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right) \cdot 1\right))_* + (\left(-\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)\right) \cdot 1 + \left(\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right) \cdot 1\right))_*}}\]
  13. Applied exp-sum2.6

    \[\leadsto \color{blue}{e^{(\left(\sqrt{\log 1}\right) \cdot \left(\sqrt{\log 1}\right) + \left(-\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right) \cdot 1\right))_*} \cdot e^{(\left(-\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)\right) \cdot 1 + \left(\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right) \cdot 1\right))_*}}\]
  14. Simplified0.5

    \[\leadsto \color{blue}{\frac{1}{(\left(\sqrt[3]{x + 1} + \sqrt[3]{x}\right) \cdot \left(\sqrt[3]{x}\right) + \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1}\right))_*}} \cdot e^{(\left(-\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right)\right) \cdot 1 + \left(\log \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{1 + x} \cdot \sqrt[3]{x}\right)\right) \cdot 1\right))_*}\]
  15. Final simplification0.5

    \[\leadsto e^{(\left(-\log \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x} \cdot \sqrt[3]{x + 1}\right)\right)\right) \cdot 1 + \left(\log \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x} \cdot \sqrt[3]{x + 1}\right)\right)\right))_*} \cdot \frac{1}{(\left(\sqrt[3]{x + 1} + \sqrt[3]{x}\right) \cdot \left(\sqrt[3]{x}\right) + \left(\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1}\right))_*}\]

Runtime

Time bar (total: 1.2m)Debug logProfile

herbie shell --seed 2018234 +o rules:numerics
(FPCore (x)
  :name "2cbrt (problem 3.3.4)"
  (- (cbrt (+ x 1)) (cbrt x)))