Average Error: 29.8 → 0.6
Time: 26.2s
Precision: 64
Internal Precision: 1408
\[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
↓
\[\frac{1}{(\left(\sqrt[3]{x}\right) \cdot \left(\left(\sqrt[3]{\sqrt[3]{x}} \cdot \sqrt[3]{\sqrt[3]{x}}\right) \cdot \sqrt[3]{\sqrt[3]{x}} + \sqrt[3]{1 + x}\right) + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}\right))_*}\]

Error

Bits error versus x

Derivation

  1. Initial program 29.8

    \[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
  2. Using strategy rm

  3. Applied flip3--29.7

    \[\leadsto \color{blue}{\frac{{\left(\sqrt[3]{x + 1}\right)}^{3} - {\left(\sqrt[3]{x}\right)}^{3}}{\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x + 1} \cdot \sqrt[3]{x}\right)}}\]

  4. Applied simplify0.5

    \[\leadsto \frac{\color{blue}{1}}{\sqrt[3]{x + 1} \cdot \sqrt[3]{x + 1} + \left(\sqrt[3]{x} \cdot \sqrt[3]{x} + \sqrt[3]{x + 1} \cdot \sqrt[3]{x}\right)}\]

  5. Applied simplify0.5

    \[\leadsto \frac{1}{\color{blue}{(\left(\sqrt[3]{x}\right) \cdot \left(\sqrt[3]{x} + \sqrt[3]{1 + x}\right) + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}\right))_*}}\]
  6. Using strategy rm

  7. Applied add-cube-cbrt0.6

    \[\leadsto \frac{1}{(\left(\sqrt[3]{x}\right) \cdot \left(\color{blue}{\left(\sqrt[3]{\sqrt[3]{x}} \cdot \sqrt[3]{\sqrt[3]{x}}\right) \cdot \sqrt[3]{\sqrt[3]{x}}} + \sqrt[3]{1 + x}\right) + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}\right))_*}\]

Runtime

Time bar (total: 26.2s)Debug logProfile

herbie shell --seed '#(1064300848 3212030778 2049303162 3567222883 2277747821 1384278011)' +o rules:numerics
(FPCore (x)
  :name "2cbrt (problem 3.3.4)"
  (- (cbrt (+ x 1)) (cbrt x)))