DHS - 2.2
№1.27. Given the vector. It is necessary to: a) calculate the mixed product of three vectors; b) Find the unit vector product; c) to calculate the inner product of two vectors; g) check whether collinear or orthogonal two vectors; e) verify whether the three vectors are coplanar a (3, -1, 5); b (2, -4, 6); c (1, -2 and 3);
№2.27. The tops of the pyramids are located at points A (-9; -7; 4); B (-4; 3; 1); C (5, -4, 2); D (3; 4; 4) ......
№3.27. Given three powers P (4, -2, and 3); Q (-2; 5; 6); R (7, 3, 1); applied to point A (-3, -2, 5). Calculate a) the work done by the resultant of these forces; when the point of its application, moving rectilinearly moves to point B (9, -5, 4); b) the value of
the resultant moment of the forces about point B.

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