## Answers

by using matrix addition I was solved this problem

If you have any queries feel Free to ask

Ex. Given that consider A4 B- dena A+B = 1 Here we can see that matrix A+B is 2 upper trangular matrix, and we know that the determiant of upper trangular matnx is just multiplication of diagona entries. 13 1 5 -5 det (A+B) = 10 2 3 4 doo doo @ maommodo = 690 - ) (2) (3) (-1) der ATB) = -18] :. ist option is correct.

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