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1. Calculate the determinants
а) b) c)
2. Solve the given system of linear equations using a) Cramer’s Rule; b) matrix method; c) Gauss’ method. Compare the results:
3. Calculate the value of the expression (А-В)(В+А)-2АВ with given matrix A and B where .
4. Given the vertices of a triangular А(7;2;2), B(2;8;4), C(3;4;-2). Find the projections of the following vectors on the coordinate axes: and the angle В.
5. Calculate the area of the parallelogram formed on the following vectors
а =(2;3;4), b =(-2;-3;4)
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