Hi guys,

I took "baby" linear algebra over the summer and now I'm in calc III and we do a mini-linear algebra unit at the end of Calc III. Unfortunately, I don't have my old linear algebra book to use as a reference which is truly unfortunate. If someone could get help me get my wheels churning on a few problems I would really appreciate it!

If matrices A and B are invertible, show that $\displaystyle (AB)^{-1}=B^{-1}A^{-1}$