Finding a Determinant using Expanding by Cofactors (9.7.3)

Question 1

• The numbers in a matrix are called the elements of the matrix.

Answer 1

• The numbers in a matrix are called the elements of the matrix.

Question 2

• A minor of a square matrix A (3x3 or greater) is the determinant of the matrix obtained by removing a row and a column of A.

Answer 2

• A minor of a square matrix A (3x3 or greater) is the determinant of the matrix obtained by removing a row and a column of A.

Question 3

• A cofactor is a minor multiplied by a power of 1.

Answer 3

• A cofactor is a minor multiplied by a power of 1.