[ 1] = .
1, , 1, , ││= 1.
2. , 1, .
3. { , 1 } .
{, , 1 } , , { , 1 } .
2. 3. , = = - .
6.52. 1111, ││= 2, ││= 1, │1│= ½. {, 1 } . ,
) 1, ) 11 , ) 11 1.
[( 3 + 2 b) ( 5 3 b)], [ b] = .
, .
[( 3 + 2 b) ( 5 3 b)] = [ 3 ( 5 + 3 b)] + [ 2 b ( 5 -3 b)] = [ 3 5 ] + [ 3 3 b] +
[ 2 b 5 ] + [ 2 b(- 3 b)] = 0 + 9 [ b] + 10 [b ] - 0 = 9 [ b] -10 [ b] =
- [ b] = -
- .
6.53. : ) [( b) ( + b)], ) [( + 2 b - ) ( -2 b)],
) [ ( 2 b + 3 )], ) [( ) ( - )].
(5,1,0),
B(2,2,-1), (1,-3,1), d(0,0,1). [ [ b ] [ d ]].
1. [ b ] [ d ].
| i j k|
[ b ] = | 5 1 0 | = - i + 5 j + 8 k [ b ] (- 1, 5, 8 ).
| 2 2 -1 |
| i j k|
[ d ] = | 1 -3 1 | = -3 i -1 j + 0 k [ d ] (- 3, -1, 0 ).
| 0 0 1 |
2. [ [ b ] [ d ]].
| i j k |
[[ b ] [ d ]] = | -1 5 8 | = 5 i -24 j + 16 k [[ b ] [ d ]] ( 5,-24,16).
|- 3 -1 0 |
. (5, -24, 16).
6.54. (3,1,2),
b (2,7,4), (1,2,1). [ b ], [ b ], [ ] .
6.55. (0,1,0),
b (2,-1,3), (0,5,-2), d (1,2,-3). :
) [ (b + ) ]; ) [b (d - ) ]; ) [( -2 d) ( + b) ]; ) [(+ b)( + d)].
6.56. (3,0,-1),
b (2,4,3), (-1,3,2), d (2,0,1). ) [ [ b ] ],
) [ ] [ b d ].
6.57. { i, j, k }. , b [ b ] = ( b i) i +( b j) j + ( b k) k.
6.58. , , b , :
) [( b)( + b)] = 2 [ b], ) [ (b )( b)] = [ b] + [ b] + [ ].
6.59. , [ b] + [b ] + [ ] = 0, , b,
.
6.60. = , = b, = . , [ b] + [b ] + [ ] ().
6.61. , ) + b + = 0, [ b] = [b ] = [ ],
|
|
) b [ b] = [b ] = [ ],
+ b + = 0.
6.62. : ) [ b]2 + ( b)2 = 2 b2,
) [ [ b] ] = b() (b).
. 63) 68) .
111 . (1,0,1), (5,0,0), (0,1,2), 1(3,-1,1).
, .
V111 = S . (*)
, , 1 . (4,0,-1), (-1,1,1), 1 (2,-1,0).
. V111 = ½ | 1 |.
| 4 0 -1 |
1= | -1 1 1 | = 5 V111 = 5/2
| 2 -1 0 |
. S = | [ ] | / 2.
| i j k |
[ ] = | 4 0 -1 | = i -5 j + 4 k [ ] ( 1, -5, 4 )
| -1 1 1 |
| [ ] | = = S = / 2.
(*) , = .
. = .
6.63. , ) (3,4,-1), (2,0,3),
(-3,5,4), ) (-1,1,2), (1,1,0), (2,6,-2).
6.64. , (2,-4,5), (-1,-3,4), (5,5,-1), (1,-2,2).
6. 65. 1111,
(4,3,0), (2,1,2), 1 (-3,-2,5). ) ; ) , ) , 1 ;
) 1; ) 11.
6.66. 111 , (0,1,-1), (2,-1,4), 1 (-3,2,2). ) ;
) ; ) ; ) 11 1.
6.67. , (2,0,0), (3,4,0), (3,4,2). ) ; ) ; ) ;
) ; ) .
6.68. , , (2,-3,1), (-1,1,1), (-4,5,6), (2,-3,6), .