Hi

f(x) = e^-x/ (1-e^-2) if 0<= x <= 2

so the question is to find the mathematical expectation of X - ie calculate

integral sign ("S") b=2; a=0 x f(x) dx

Now I am not completely sure where the x came from so a clue there would be helpful.

But really I am not sure what to do with this - even if the x shouldn't be there I am not sure if I should use partial integration since I can't tell what should be

u and what should be dv when both have e's to the power so I don't know how that would make them dv able.

All help would be appreciated.

Beginner Calculus