Matricied Flashcards
1
Q
Remember Det m x n
A
= Det mn
2
Q
Remember matricy commutive
A
Is not true in general case but CAN BE true for a particular case, hence with these variables always be careful
3
Q
How to find value for which planes form a sheaf
A
Det M 0 and the planes need to be consistent, eliminate one variable and show how they thr same, that means right hand same too
4
Q
What matrices are the only ones that have inverses?
How can you check yourself if it’s an inverse (what NOT TO DO)
A
Only SQAURE MATRICIES have them, if not then not
2) just because it multiplied and gave identify , doesn’t mean it’s an inverse, could be special case
- thus do the reverse multiplication yourself if it gives you I now, now can safely say it is,
DONT LACK
