1 | (3; -2; -4). . . xOz. | |
2 | CDEF : C(-4; 1; 5), D(-5; 4; 2), E(3; -2; -1), F(x; y; z). F. | |
3 | ABCDAA1B1C1D1. , + 1 1D1. | |
4 | (-3; 2; -1), (2; -1; -3), (1; -4; 3), D(-1; 2; -2). | |
5 | (3; -2; 1), D(-1; 2; 1), M(2; -3; 3), N(-1; 1; -2). CD MN. |
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1 | (-7; 4; -3). . . Oz. | |
2 | CD : (4; -1; 3), (-2; 4; -5), (1; 0; -4) D(x; y; z). D. | |
3 | ABCDAA1B1C1D1. , A1 - D1 + B. | |
4 | C(-4; -3; -1), D(-1; -2; 3) M(2; -1; -2), N(0; 1; -3). | |
5 | A(1; -1; -4), B(-3; -1;0), C(-1; 2; 5), D(2; -3; 1). CD AB. |
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1 | : (2; -1; -3), (-3; 5; -2), (-2; 3; -5). . . | |
2 | : (4; -3; 2), (-1; -5; 4). , . | |
3 | ABCDAA1B1C1D1. , D + 1 B1A1. | |
4 | (-3; 2; -1), (2; -1; -3), (1; -4; 3), D(-1; 2; -2). | |
5 | A(3; -2; 1), B(-1; 2; 1), M(2; -3; 3), N(-1; 1; -2). AB MN. |
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1 | DE: C(-3; 4; 2), D(1; -2; 5), E(-1; -6; 4). DK CDE. DK. | |
2 | : P(4; -5; 2), C(-1; 3; 1). K, z P C. | |
3 | ABCDAA1B1C1D1. , 1D1 + 1 B1A1. | |
4 | M(-3; 2; -1), N(2; -1; -3), P(1; -4; 3), K(-1; 2; -2). | |
5 | A(2; -3; 1), B(-1; 2; 1), M(3; -2; 3), N(-1; 2; -3). AB MN. |
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