Average Error: 20.0 → 0.2
Time: 1.9m
Precision: 64
Internal Precision: 1088
\[\frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x + 1}}\]
\[\frac{\frac{{x}^{\left(-\frac{1}{2}\right)}}{\sqrt{1 + x}}}{\sqrt{x + 1} + \sqrt{x}}\]

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original20.0
Target0.7
Herbie0.2
\[\frac{1}{\left(x + 1\right) \cdot \sqrt{x} + x \cdot \sqrt{x + 1}}\]

Derivation

  1. Initial program 20.0

    \[\frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x + 1}}\]
  2. Using strategy rm
  3. Applied frac-sub20.0

    \[\leadsto \color{blue}{\frac{1 \cdot \sqrt{x + 1} - \sqrt{x} \cdot 1}{\sqrt{x} \cdot \sqrt{x + 1}}}\]
  4. Applied simplify20.0

    \[\leadsto \frac{\color{blue}{\sqrt{x + 1} - \sqrt{x}}}{\sqrt{x} \cdot \sqrt{x + 1}}\]
  5. Using strategy rm
  6. Applied flip--19.7

    \[\leadsto \frac{\color{blue}{\frac{\sqrt{x + 1} \cdot \sqrt{x + 1} - \sqrt{x} \cdot \sqrt{x}}{\sqrt{x + 1} + \sqrt{x}}}}{\sqrt{x} \cdot \sqrt{x + 1}}\]
  7. Applied associate-/l/19.7

    \[\leadsto \color{blue}{\frac{\sqrt{x + 1} \cdot \sqrt{x + 1} - \sqrt{x} \cdot \sqrt{x}}{\left(\sqrt{x} \cdot \sqrt{x + 1}\right) \cdot \left(\sqrt{x + 1} + \sqrt{x}\right)}}\]
  8. Using strategy rm
  9. Applied associate-/r*19.7

    \[\leadsto \color{blue}{\frac{\frac{\sqrt{x + 1} \cdot \sqrt{x + 1} - \sqrt{x} \cdot \sqrt{x}}{\sqrt{x} \cdot \sqrt{x + 1}}}{\sqrt{x + 1} + \sqrt{x}}}\]
  10. Applied simplify0.4

    \[\leadsto \frac{\color{blue}{\frac{\frac{1}{\sqrt{x}}}{\sqrt{1 + x}}}}{\sqrt{x + 1} + \sqrt{x}}\]
  11. Using strategy rm
  12. Applied pow1/20.4

    \[\leadsto \frac{\frac{\frac{1}{\color{blue}{{x}^{\frac{1}{2}}}}}{\sqrt{1 + x}}}{\sqrt{x + 1} + \sqrt{x}}\]
  13. Applied pow-flip0.2

    \[\leadsto \frac{\frac{\color{blue}{{x}^{\left(-\frac{1}{2}\right)}}}{\sqrt{1 + x}}}{\sqrt{x + 1} + \sqrt{x}}\]

Runtime

Time bar (total: 1.9m)Debug logProfile

herbie shell --seed '#(1072967564 1937075727 894099792 790700740 1036514779 1027793188)' 
(FPCore (x)
  :name "2isqrt (example 3.6)"

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

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