I was reading a scientific pager by Stephen Hawkings and there was a disclaimer on it saying "This paper is intended for people with university colleage level or higher."(adsbygoogle = window.adsbygoogle || []).push({});

So, somewhere it says on there to e, something to do with the universe. I really don't understand e. I've heard log base e is equal to [tex]e^x[/tex]?

I'm 16 in high school.

Also, my question with derivatives.

I was reading a very old book that was republished, in fact it was my first book about calculus. And it said whenever you have some deriviative such as [tex]dx^2[/tex] is negligible since dx is an infinitely small piece and that squared is negatve infinite squared, which is impossible?

I also don't understand what the difference between [tex]dx[/tex] and [tex]dx/d[/tex] is.

If you have [tex]dx/d[/tex] don't the d's cancel out? Or not?

Thanks for the help.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Help with derivatives please

**Physics Forums | Science Articles, Homework Help, Discussion**