2 answers to same integral??!! 1. The problem statement, all variables and given/known data Ive been giong mental over this. There seems to be two different answers to the same integral. I cant work out which is correct. Integral from 0 to infinity of: x(squared) exp(-2Bx(squared)) 2. Relevant equations What is the right answer? 3. The attempt at a solution Integration by parts gives the answer as: -1/2B My course lecturer gives the answer as: (1/8B) x route of (pie/2B) I think she must have used the general formula: Integral from -infinity to + infinity of x(power2n)exp(-Ax(squared)) = [1x3x5...(2n-1)]x(pie/A)/2(powern)A(powern) and divided it by 2 as we only want the integral from 0 to infinity. Whos right?? Can anyone work this out? Please! write it down and see if you get the answer i did by integration by parts. If you do, do you think the lecturer is wrong? Please help, i have an important exam tomorrow!