How Does Substituting t=e^x Simplify the Integral Calculation?

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SUMMARY

The discussion focuses on simplifying the integral calculation of ∫0Log(2)Sin[(π/2)e^(2x)]e^xdx using the substitution t=e^x. This substitution transforms the integral into a more manageable form, allowing for the application of the FresnelS function. The result of the integral is expressed as -FresnelS[1] + FresnelS[2], highlighting the effectiveness of the substitution in simplifying complex calculations. Participants emphasize the importance of recognizing the relationship between the variables during the transformation process.

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  • Understanding of integral calculus
  • Familiarity with the Fresnel integral function
  • Knowledge of substitution methods in integration
  • Basic proficiency in using Mathematica for symbolic computation
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eclayj
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Homework Statement



Mathematica's calculation of ∫0Log(2)Sin[(\pi/2)e2x]exdx = -FresnelS[1] + FresnelS[2]

Remembering that FresnelS[x] = ∫0tSin[(\pi/2)t2]dt, You announce that a transformation you can use to help explain Mathematica's output is that every time x goes up by one unit, t=?


Not even sure how to approach this at all. Any suggestions or help on how to start this is appreciated!
 
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I'd start with a quick substitution, t=e^x. That'll make things real easy.
 

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