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Re: How do I force Log[Exp[x]]=x


Hi,

there are so many ways

Log[Exp[x]] // PowerExpand

Simplify[Log[Exp[x]], Element[x, Reals]]

FullSimplify[Log[Exp[x]], Element[x, Reals]]

Regards
  Jens

Bart Killam wrote:
> 
>   For real x, Log[Exp[x]]=x. For general complex x
> Mathematical leaves this expression unevaluated. I
> have tried Log[Exp[x/;Im[x]=0]], but this give a result
> of 0.
> 
>   How do I tell Mathematica that I want the expression
> simplied for real x ? Thanks for any help.


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