Linear algebra Flashcards
1
Q
what is the highest number in the set of Z 12
A
11
2
Q
when can you times 2 matricies
A
when the 1st matrix has the same number of coloums as the other has rows
3
Q
2 vectors are linearly independant if
A
a(v1)+b(v2) = 0 iff a = b =0
4
Q
determinant of an invertible matrix is
A
non zero
5
Q
is A is invertible then A*-1 =
A
1/det(A) (d -b; -c a)
6
Q
A is symetric if
A is skew-symetric
A
a = a transpose
a transpose = - a
