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Question about integrals and restricted values of variables

Posted 11 years ago
Hello, I am new to Mathematica, and I have run into something unexpected with the following integral:



Straightforward enough, but when I re-write the integral as



I see this unexpected bit at the end of the step-by-step solution:



Why has the 2*log(e^x) term dissapeared instead of simplifying to 2*x?  Is Mathamatica making assumptions about the restricted values of x, or am I just missing something?
POSTED BY: Dan S
2 Replies
Posted 11 years ago
Thank you!  That's what I get for doing math at midnight instead of going to bed and trying the next day.
POSTED BY: Dan S
Mathematica is quite correct. 

POSTED BY: Marco Thiel
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