Option 12 DHS 1.1

Option 12 DHS 1.1

DHS - 1.1
№ 1.12. For this determinant find the minors and algebraic additions.
Calculate the determinant: a) spreading it over the elements of the i line; b) spreading it out
j column elements; c) having previously received zeros in the i line. i = 1; j = 2.
№ 2.12. Two matrices A and B are given. Find: a) AB; b) BA; c) A – 1; d) AA – 1; e) A – 1A.