Average Error: 29.8 → 29.7
Time: 21.7s
Precision: 64
Internal precision: 1408
\[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
\[\frac{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot \left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)} + e^{\frac{\log x}{3}}\right) + {\left(\sqrt[3]{x}\right)}^2}\]

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 flip3-- 29.7

    \[\leadsto \color{blue}{\frac{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^{3} - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^{3}}{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}}\]
  4. Applied simplify 29.7

    \[\leadsto \frac{\color{blue}{{\left({\left(1 + x\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}}{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
  5. Applied taylor 29.7

    \[\leadsto \frac{{\left({\left(1 + x\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^2 + \left({\left({x}^{\frac{1}{3}}\right)}^2 + {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
  6. Taylor expanded around 0 29.7

    \[\leadsto \frac{{\left({\left(1 + x\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^2 + \left({\color{blue}{\left({x}^{\frac{1}{3}}\right)}}^2 + {\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
  7. Applied simplify 29.7

    \[\leadsto \color{blue}{\frac{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot \left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)} + {x}^{\left(\frac{1}{3}\right)}\right) + {\left(\sqrt[3]{x}\right)}^2}}\]
  8. Using strategy rm
  9. Applied pow-to-exp 29.7

    \[\leadsto \frac{{\left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} \cdot \left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)} + \color{blue}{e^{\log x \cdot \frac{1}{3}}}\right) + {\left(\sqrt[3]{x}\right)}^2}\]
  10. Applied simplify 29.7

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

Runtime

Time bar (total: 21.7s) Debug logProfile

Please include this information when filing a bug report:

herbie shell --seed '#(1064555532 179913862 452496668 2441903500 287849034 462453547)'
(FPCore (x)
  :name "2cbrt (problem 3.3.4)"
  (- (pow (+ x 1) (/ 1 3)) (pow x (/ 1 3))))