Types, operations, transpose, adjoint, inverse, system of linear equations.
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Q1 · Matrices · EASY
If A = [1 2; 3 4] and B = [2 0; 1 3], then A + B equals
Q2 · Matrices · MEDIUM
If A is a 2×2 matrix with det(A) = 5, then det(3A) equals
Q3 · Matrices · HARD
If A = [cos θ -sin θ; sin θ cos θ], then A² equals