How do I enter the math symbol 'e' in my TI-89?

Answer 1

You can use the Char menu (2nd and + I believe) which has all the symbols you could want. Just look in math under that. Or for e specifically, you can use the e^( button (it's a diamond shift on one of the buttons along the left side) and just delete back to just e. Or you can look at the catalog and hit letter key that has e for it's alpha shift and then find e in there. Should be the first one with that method.

BTW, regular or Titanium edition?