Ch 3: determinants Flashcards
1
Q
Given A = [a_ij], what is the (i, j)-cofactor?
A
The number C_ij given by
Cij = (-1)^(i + j) * det A_ij
2
Q
What is the cofactor expansion across the first row?
A
Formula to get the determinant. Book omits proof =(
