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(10 marks) Question 5 (20 marks) 1-2 -1 1 Given that A = -3 1 21 2 -21 a) Find detA. (2 marks) b) Find the corresponding
Posted: Fri May 20, 2022 10:26 am
by answerhappygod
- 10 Marks Question 5 20 Marks 1 2 1 1 Given That A 3 1 21 2 21 A Find Deta 2 Marks B Find The Corresponding 1 (21.3 KiB) Viewed 28 times
(10 marks)
Question 5 (20 marks) 1-2 -1 1 Given that A = -3 1 21 2 -21 a) Find detA. (2 marks) b) Find the corresponding cofactor matrix of A. Show your working clearly. (6 marks) c) Hence, find A-1 (4 marks) d) Hence, solve the following system of linear equations using inverse matrix method. x - 5y + 3z = -14 4x - 7y - z = -17 6x - 4y + 5z = -19 (1) (2) (3) (8 marks)