The inverse of a certain matrix A is given as 3 -1 -2 6 A^-1 = -3 -2 Use this information to find IA tr(adj(A))
Added by Nuria V.
Step 1
We know that: A * A^-1 = I where I is the identity matrix. Using the given inverse, we have: A * (3 -1; -2 6) = (-3 -2; x y) where x and y are unknown elements of the resulting matrix. We can solve for x and y by multiplying the matrices and equating Show more…
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