MTH10013 LINEAR ALGEBRA AND APPLICATIONS Test 1 (20%) Marking Scheme

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, MTH10013 LINEAR ALGEBRA AND APPLICATIONS Test 1 (20%)

Marking Scheme


6 5 3 2 7 9 1
1) If 𝐴 = [ 7 9 ] , 𝐵 = [6 −1 ] and 𝐸 = [ 3 12 4] , find det(𝐴𝐵𝑇 − 3𝐸).
−1 11 1 0 3 −6 5




(3 marks)
(OR)
9 −3 4
1 1 2 0 −1 1
If 𝐴 = [ ] , 𝐵 = [5 3 12] and 𝐷 = [ ] , find det(𝐵 − 2𝐴𝑇 𝐷).
0 2 3 2 1 −3
6 −9 7




(3 marks)
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