Average Error: 30.0 → 29.9
Time: 23.5s
Precision: 64
Internal Precision: 128
\[\sqrt{x + 1} - \sqrt{x}\]
\[\frac{(e^{\log_* (1 + \left(\left(\sqrt{\sqrt[3]{1 + x}} \cdot \left|\sqrt[3]{1 + x}\right|\right) \cdot \left(\sqrt{\sqrt[3]{1 + x}} \cdot \left|\sqrt[3]{1 + x}\right|\right) - \sqrt{x} \cdot \sqrt{x}\right))} - 1)^*}{\left|\sqrt[3]{1 + x}\right| \cdot \sqrt{e^{\log \left(\sqrt[3]{1 + x}\right)}} + \sqrt{x}}\]

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original30.0
Target0.2
Herbie29.9
\[\frac{1}{\sqrt{x + 1} + \sqrt{x}}\]

Derivation

  1. Initial program 30.0

    \[\sqrt{x + 1} - \sqrt{x}\]
  2. Initial simplification30.0

    \[\leadsto \sqrt{1 + x} - \sqrt{x}\]
  3. Using strategy rm
  4. Applied add-cube-cbrt30.0

    \[\leadsto \sqrt{\color{blue}{\left(\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}\right) \cdot \sqrt[3]{1 + x}}} - \sqrt{x}\]
  5. Applied sqrt-prod30.0

    \[\leadsto \color{blue}{\sqrt{\sqrt[3]{1 + x} \cdot \sqrt[3]{1 + x}} \cdot \sqrt{\sqrt[3]{1 + x}}} - \sqrt{x}\]
  6. Simplified30.0

    \[\leadsto \color{blue}{\left|\sqrt[3]{x + 1}\right|} \cdot \sqrt{\sqrt[3]{1 + x}} - \sqrt{x}\]
  7. Using strategy rm
  8. Applied flip--29.9

    \[\leadsto \color{blue}{\frac{\left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) \cdot \left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) - \sqrt{x} \cdot \sqrt{x}}{\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}} + \sqrt{x}}}\]
  9. Using strategy rm
  10. Applied expm1-log1p-u29.9

    \[\leadsto \frac{\color{blue}{(e^{\log_* (1 + \left(\left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) \cdot \left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) - \sqrt{x} \cdot \sqrt{x}\right))} - 1)^*}}{\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}} + \sqrt{x}}\]
  11. Using strategy rm
  12. Applied add-exp-log29.9

    \[\leadsto \frac{(e^{\log_* (1 + \left(\left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) \cdot \left(\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\sqrt[3]{1 + x}}\right) - \sqrt{x} \cdot \sqrt{x}\right))} - 1)^*}{\left|\sqrt[3]{x + 1}\right| \cdot \sqrt{\color{blue}{e^{\log \left(\sqrt[3]{1 + x}\right)}}} + \sqrt{x}}\]
  13. Final simplification29.9

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

Runtime

Time bar (total: 23.5s)Debug logProfile

herbie shell --seed 2018349 +o rules:numerics
(FPCore (x)
  :name "2sqrt (example 3.1)"

  :herbie-target
  (/ 1 (+ (sqrt (+ x 1)) (sqrt x)))

  (- (sqrt (+ x 1)) (sqrt x)))