It is not "-", it is "+" at (e²/2 + 0) - (1/2 + 0)
The problem is: the integral from 1 to e of (x² + 1)/(x)
so you have to distribute the x^-1 to the numerator and you get
x + 1/x and then you have to integrate
x²/2 + lnx
and then you do f(b) - f(a)
(e²/2 + 0) - (1/2 + 0) so then its e²/2 - 1/2 so isn't the answer (e²-1)/2 ??? The online answer says (e²+1)/2
this site (Answers and solutions to 2008 Multiple Choice BC 9-14) says otherwise, claiming that its plus and not minus. *******ITS NUMBER 13**********
where did I go wrong?!?
Why wouldn't it be "-", because when integrating you do the upper limit - the lower limit, after plugging in.
So since they both have a denominator of 2, it goes on bottom and you subtract the e term and .5 on top.
I don't get how it could be anything else. Sorry if I'm being hard-headed.