Question

How can this answer be 0? isnt there division by 0? http://www.wolframalpha.com/input/?i=int+from+0+to+0%3A+e^%28-1%2Fx%29%2Fx^2

Answer 1

see if you have some question for integration of f' from a to a
then after integration what you get (and put limits too) F(a) - F(a) which should be zero

Answer 2

Ok

Answer 3

This is the real reason I asked this question: http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4e30219e0b8ba7b2da405e58