Can I Integrate e^[1 / (1 + t)] dt Numerically?

  • Thread starter irony of truth
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In summary, The function e^[1 / (1 + t)] dt cannot be integrated nicely and numerically is the best approach. There is a connection between Ei (exp.integral) and Si (sinus integral), and you can refer to the Wolfram website for more information. The code for this function has more characters than "numerically".
  • #1
irony of truth
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How do I integrate this? e^[1 / (1 + t)] dt?
 
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  • #2
Short answer: Numerically.
There exist no nice anti-derivative to this function.
 
  • #3
I see... so this could be the same case as that of (sinx / x) dx...
 
  • #4
Long answer:
[tex]\allowbreak \left( 1+x\right) e^{\frac 1{1+x}}+\func{Ei}\left( 1,-\frac 1{1+x}\right) +C [/tex]

Daniel.
 
  • #5
irony of truth said:
I see... so this could be the same case as that of (sinx / x) dx...

Yes,there is a connection between Ei (exp.integral) and Si (sinus integral).

Daniel.

P.S.Chack the wolfram site for more.
 
  • #6
dextercioby said:
Long answer:
[tex]\allowbreak \left( 1+x\right) e^{\frac 1{1+x}}+\func{Ei}\left( 1,-\frac 1{1+x}\right) +C [/tex]

Daniel.
I'd rather say apparently short answer..
 
  • #7
Yes,"apparently" is a well placed word...:wink:

Daniel.

P.S.Anyways,the # of characters from the code is much bigger than the # of letters from "numerically"...
 

FAQ: Can I Integrate e^[1 / (1 + t)] dt Numerically?

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