Hi I've been asked to prove

using

but I'm not sure how to go about it.

If I start;

I don't see how to go anywhere else but to prove that

(The latex is really messed up on this site & I can't put minuses & subscripts into the exponents, I've made it as reasonably clear as I can).

Moderator edit:No, the latex is not "really messed up on this site". You just don't know how to format the code. Reading the Latex Tutorial always helps: http://www.mathhelpforum.com/math-he...-tutorial.html.