There should be a gamma coefficient. I've put it in using latex but it doesn't seem to be showing in the preview...
The Attempt at a Solution
I know that the answer is (3/4)*gamma*a^4 (I can't seem to get Latex to work any more... sorry :/), my lecturer did all the steps leading up to the integral on the board then went straight to the answer so I'm guessing it's a definite integral.
I know that without the constant coefficient and with x^2 instead of x^4 the answer is (1/2)(pi*a^6)^0.5, it's given on a formula sheet. I have no idea what to do for x^4 though...
Both integrals are between + and - infinity.
Any help would be greatly appreciated.
Edit: I see the gamma is showing now. If you would like me to put the other couple of solutions in then let me know and I'll have another go