Average Error: 29.8 → 2.6
Time: 23.6s
Precision: 64
Ground Truth: 128
\[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
\[\frac{1}{{\left(\sqrt[3]{1 + x}\right)}^2 + {x}^{\left(\frac{1}{3}\right)} \cdot \left({x}^{\left(\frac{1}{3}\right)} + \sqrt[3]{1 + x}\right)}\]

Error

Bits error versus x

Derivation

  1. Initial program 29.8

    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
  2. Using strategy rm
  3. Applied add-exp-log 30.0

    \[\leadsto {\color{blue}{\left(e^{\log \left(x + 1\right)}\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
  4. Applied pow-exp 30.0

    \[\leadsto \color{blue}{e^{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
  5. Applied simplify 29.7

    \[\leadsto e^{\color{blue}{\frac{\log \left(x + 1\right)}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
  6. Using strategy rm
  7. Applied flip3-- 29.7

    \[\leadsto \color{blue}{\frac{{\left(e^{\frac{\log \left(x + 1\right)}{3}}\right)}^{3} - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^{3}}{{\left(e^{\frac{\log \left(x + 1\right)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log \left(x + 1\right)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}}\]
  8. Applied simplify 29.5

    \[\leadsto \frac{\color{blue}{\left(x + 1\right) - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}}{{\left(e^{\frac{\log \left(x + 1\right)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log \left(x + 1\right)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
  9. Applied simplify 29.6

    \[\leadsto \frac{\left(x + 1\right) - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{\color{blue}{{x}^{\left(\frac{1}{3}\right)} \cdot \left({x}^{\left(\frac{1}{3}\right)} + \sqrt[3]{x + 1}\right) + {\left(\sqrt[3]{x + 1}\right)}^2}}\]
  10. Applied taylor 29.6

    \[\leadsto \frac{\left(1 + x\right) - {\left({x}^{\frac{1}{3}}\right)}^3}{{x}^{\left(\frac{1}{3}\right)} \cdot \left({x}^{\left(\frac{1}{3}\right)} + \sqrt[3]{x + 1}\right) + {\left(\sqrt[3]{x + 1}\right)}^2}\]
  11. Taylor expanded around 0 29.6

    \[\leadsto \frac{\color{blue}{\left(1 + x\right) - {\left({x}^{\frac{1}{3}}\right)}^3}}{{x}^{\left(\frac{1}{3}\right)} \cdot \left({x}^{\left(\frac{1}{3}\right)} + \sqrt[3]{x + 1}\right) + {\left(\sqrt[3]{x + 1}\right)}^2}\]
  12. Applied simplify 2.6

    \[\leadsto \color{blue}{\frac{1}{{\left(\sqrt[3]{1 + x}\right)}^2 + {x}^{\left(\frac{1}{3}\right)} \cdot \left({x}^{\left(\frac{1}{3}\right)} + \sqrt[3]{1 + x}\right)}}\]
  13. Removed slow pow expressions

Runtime

Total time: 23.6s Debug log

Please include this information when filing a bug report:

herbie --seed '#(3496132440 600335813 1639980210 1383344810 942685300 1863895872)'
(FPCore (x)
  :name "NMSE problem 3.3.4"
  (- (pow (+ x 1) (/ 1 3)) (pow x (/ 1 3))))