Linear Algebra: Jan 22, some proofs of matrix algebra part 1

I run through the notes up to the concatenation proposition. I give a couple hints on how to start your homework. In particular, Problems 10, 11 and 12. In short, use the index notation, don't try to brute force it.

[abdelhamid_elpt]

Hello Prf.J.Cook can sugest me a nice few books to well understand this topic added to your beautiful videos. And thanks lot.