Hey!
Letting
then I think
.
Then, since as you have shown, you just need to prove that
Hey here is a question I am currently stuck on:
Let be three vectors in . Recall that the orientated volume of the parallelpiped spanned by equals .
If is a matrix prove that
.
The first part of the question (which i got) involved proving that V(u,v,w) = det of the matrix with its first row u, second row v, and third row w. I assume that will likely be useful in this proof.
Honestly not really sure how to do this, other than of course brute forcing and expanding everything and multiplying it together, but i assume there is a much better way to do this. Any help would be great!