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$\frac{e^{0.75}}{-0.5^e+10000}$

This doesn't work either:

$\frac{2.72^{0.75}}{-0.5^{2.72}+10000}$

I can even solve it with a calculator.

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    http://screencast.com/t/OBW9dbURsXF http://screencast.com/t/Sv3ZzWKJYJMy A = the intersection between a and g.2012-06-05

2 Answers 2

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First of all, $(-0.5)^e$ is not the same as $-0.5^e$.

Secondly, $x^y$ is not well defined (at least not as a real number) if $x < 0$ and $y$ is not an integer.

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    @50ndr33 From your reply in the comment above, you seemed confused about the difference. (You wrote one thing in the question, another in the comment.) I don't have any of the two programs you mention available, but I know there are some programs that get the priority rules wrong, i.e. interpreting $-0.5^e$ as $(-0.5)^e$. Wolfram Alpha gets it right: http://www.wolframalpha.com/input/?i=e%5E0.75%2F%28-0.5%5Ee%2B10000%292012-06-05
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Mathway refuses to numerically evaluate. Geogebra Does evaluate the expression correctly

e^(.75)/(10000-.5^e) 

Gives

a=0 

but if you right click on a and go to object properties the value says

0.00021 

which agrees with google calculator

https://www.google.com/search?q=exp%28.75%29%2F%2810000-.5^e%29

Why you would want to evaluate this in geogebra is beyond me

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    So the expression $x^e$ is only a well defined real number if $x \ge 0$. Your calculator may be giving you *one* of the possible complex multi-valued solutions.2012-06-05