NOTE: This isn't homework.(adsbygoogle = window.adsbygoogle || []).push({});

So I'm trying to integrate a really awkward integral with limits from a to infinity;

[itex]\int^{∞}_{30471.2729807}(\frac{83.1451 * 373.15}{X})-(\frac{83.1451 * 373.15}{X-30.4811353}-\frac{5534906.5380409}{X^2})dX[/itex]

Since the Simpson's and Trapezoidal would be really awkward to use with these (I literally used a limit of 30471.2729807 to 1000000000 (lol)) I tried to search for other alternatives, and I found this.

I can't understand how this is implemented though. This transformation

[itex]\int^{∞}_{a}f(X)dX → \int^{∞}_{0}f(X+a)dX[/itex]

is bothering me as well. Can someone point me where a step-by-step algorithm of the method's implementation is made; or if possible, someone tell me how it was done?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Double exponential integration (a,∞) - how to implement.

Loading...

Similar Threads - Double exponential integration | Date |
---|---|

A Maximization Problem | Jan 31, 2018 |

I Q about finding area with double/volume with triple integral | Sep 13, 2017 |

B Derivative with the double cross product | Jul 18, 2017 |

I Find total charge (using double integration) | Apr 15, 2017 |

A Closed form for series over Exponential Integral | Feb 16, 2017 |

**Physics Forums - The Fusion of Science and Community**