Average Error: 30.1 → 0.6
Time: 43.0s
Precision: 64
Internal Precision: 1408
\[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
\[\frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}} \cdot \sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}}\right) \cdot \sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \left(\sqrt[3]{1 + x} - \sqrt[3]{x}\right)}}}\]

Error

Bits error versus x

Derivation

  1. Initial program 30.1

    \[\sqrt[3]{x + 1} - \sqrt[3]{x}\]
  2. Using strategy rm
  3. Applied flip3--30.1

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

    \[\leadsto \frac{1}{\color{blue}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{x} + \sqrt[3]{1 + x}\right) \cdot \sqrt[3]{x}}}\]
  6. Using strategy rm
  7. Applied flip3-+0.6

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \color{blue}{\frac{{\left(\sqrt[3]{x}\right)}^{3} + {\left(\sqrt[3]{1 + x}\right)}^{3}}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}} \cdot \sqrt[3]{x}}\]
  8. Applied associate-*l/8.1

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \color{blue}{\frac{\left({\left(\sqrt[3]{x}\right)}^{3} + {\left(\sqrt[3]{1 + x}\right)}^{3}\right) \cdot \sqrt[3]{x}}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}}}\]
  9. Applied simplify7.9

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \frac{\color{blue}{\sqrt[3]{x} + \sqrt[3]{x} \cdot \left(x + x\right)}}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}}\]
  10. Using strategy rm
  11. Applied add-cube-cbrt8.1

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \color{blue}{\left(\sqrt[3]{\frac{\sqrt[3]{x} + \sqrt[3]{x} \cdot \left(x + x\right)}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}} \cdot \sqrt[3]{\frac{\sqrt[3]{x} + \sqrt[3]{x} \cdot \left(x + x\right)}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}}\right) \cdot \sqrt[3]{\frac{\sqrt[3]{x} + \sqrt[3]{x} \cdot \left(x + x\right)}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}}}}\]
  12. Applied simplify8.1

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \color{blue}{\left(\sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}} \cdot \sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}}\right)} \cdot \sqrt[3]{\frac{\sqrt[3]{x} + \sqrt[3]{x} \cdot \left(x + x\right)}{\sqrt[3]{x} \cdot \sqrt[3]{x} + \left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} - \sqrt[3]{x} \cdot \sqrt[3]{1 + x}\right)}}}\]
  13. Applied simplify0.6

    \[\leadsto \frac{1}{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x} + \left(\sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}} \cdot \sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - \frac{\sqrt[3]{1 + x} - \sqrt[3]{x}}{1}}}\right) \cdot \color{blue}{\sqrt[3]{\frac{x + \left(1 + x\right)}{\frac{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}}{\sqrt[3]{x}} - 1 \cdot \left(\sqrt[3]{1 + x} - \sqrt[3]{x}\right)}}}}\]
  14. Applied simplify0.6

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

Runtime

Time bar (total: 43.0s)Debug logProfile

herbie shell --seed '#(1070960995 739739648 2531964651 3069671617 351857262 3877178482)' 
(FPCore (x)
  :name "2cbrt (problem 3.3.4)"
  (- (cbrt (+ x 1)) (cbrt x)))