Learn to write the determinant of a 3x3 matrix. Using a 3x3 determinant formula and the shortcut method, understand how to find the determinant of...
△Properties of Determinants --If matrix B result from matrix A by interchaning two rows (columns) of A, then det(B)=-det(A)--If two rows (columns) of A are equal then det(A)=0 EX <proof> Suppose that rows r and s of A are equal. Interchaning rows r and s of A to obtai...