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-
2005
- , : , , , .
:
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2) , , (), ;
3) . , . , .
4) . , , . .
4) , , , . .
5) . , .
6) , , .
, , .
. - , ; .
.
, , , . .
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- .., .., .. : . / . .. .- , , 2004.
- .., .. . .: , 1995.
- .., .., .. . 2 . .: , 1999.
- .. . . - .: ,2003.
- .., .. . .: , 1980.
- / .. , .. , .. , .. . .: , 2000.
- .. . .: , 1976.
- .. . .: , 1983. .1.
- .. . .: , 1992.
1.
. : 1) ; 2) ; 3) .
1 ) x1 - 52 + 23 = 6
3x1 - 2 - 3 = - 3
- 2 x1 + 22 + 33 = 3
. .
∆= = 1∙(-1)∙3 + (-5)∙(-1)∙(-2) + 2∙3∙2 - 2∙(-1)∙(-2) (-5)∙3∙3 - 1∙(-1)∙2=42.
∆≠0, .
∆1, ∆2,∆3, - , ∆ 1, 2 3- .
∆1 = = - 42, ∆2 = = -42,, ∆3 = = 42.
, : 1=∆1/∆=-1, 2= ∆2/∆=-1, 3= ∆3/∆= 1.
.
-1 - 5∙ (-1) + 2∙1 = 6 - ,
3∙(-1) (-1) 1 = -3 - ,
-2∙(-1) + 2∙(-1) + 3∙1 = 3 - .
: 1=-1, 2= -1, 3= 1.
2) .
x1 - 52 + 23 = 6
3x1 - 2 - 3= - 3
- 2 x1 + 22 + 33 = 3
. .
1. 1- (- 3), 2 , , x1 .
2. 2- 4 3-, 2.
, :
3- : 33 = 3 3 = 1
2 - : 22 - 3 = -3 22 - 1 = -3 2 = -1
1 - : x1 - 52 + 23 = 6 x1 + 5 + 2 = 6 x1 = -1
: 1=-1, 2= -1, 3= 1.
3). .
A = ; = ; = .
: | A| = 42, . -1
|
|
||Ai j|| = . ||Ai j ||T = . , -1 = 1/42 .
, : =-1∙
= = 1/42 = 1/42 = .
: 1=-1, 2= -1, 3= 1.
2. 1(3; -2; 2), 2(1; -3; 1), 3(2; 0; 4),4(6; -4: 6). :
1) 1 2
2) 1 2 1 3
3) 123
4) 1234
. 1) 12:
=(1 - 3)i+ (-3 (-2))j +(1 2)k= - 2i - 1j - k.
, .. 12
2) =(2 3) i +(0 (- 2))j +(4 -2) k = - i + 2j + 2 k.
∙ =(-2) ∙ (-1) + (-1) ∙ 2 + (-1) ∙ 2 = - 2, : .
, φ , φ =π arccos0,27 = 1,85 0,01. 1 2 1 3 .
3) 123 , , .. :
x = .
. ,
.
4) V 1/6 ,
, . =3 i - 2j + 4 k.
.
. :
1) 2 x2 + 3 y2 - 4x + 6y - 7 = 0;
2) 2 x y = a2
1). B = 0, = -72 0, = 6 > 0 -
: 2 (x - 1)2 + 3 (y + 1)2 - 12 = 0
(1; - 1), X = x - 1, Y = y + 1 X2 /6 + Y2 /4 = 1, a = 2.48,b = 2
2). B = 1, = a2 0, = - 1 < 0 -
, .. . .. (45) tg 2 = B/(A - C) = , .. = 450. (46) A+, C+ (48): t2 = 1 t1,2 = 1 A+ = 1, C+ = -1, .. X2 - Y2 = a2 X2 / a2 - Y2 / a2 = 1
2 = 2 (0;0). , , .
1
1
. : 1) ; 2) ; 3) .
21 + 2 + 33 = 7
1.1 21 + 32 + 3 = 1
31 + 22 + 3 = 6
21 - 2 + 23 = 3
1.2 1 + 2 + 23 = -4
41 + 2 + 43 = -3
31 - 2 + 3 = 12
1. 3 1 + 22 + 43= 6
51 + 2 + 23 = 3
21 - 2 + 33 = -4
1.4 1 + 32 - 3 = 11
1 - 22 + 23 = -7
31 - 22 + 43 = 12
1.5 31 + 42 - 23 = 6
21 - 2 - 3 = -9
81 + 32 - 63 = -4
1.6 1 + 2 - 3 = 2
41 + 2 - 33 = -5
41 + 2 - 33 = 9
1.7 1 + 2 - 3 = -2
81 + 32 - 63 = 12
21 + 32 + 43 = 33 1.8 71 - 52 = 24
41 + 113 = 39
21 + 32 + 43 = 12
1.9 71 - 52 + 3 = -33
41 + 3 = -7
1 + 42 - 3 = 6
1.10 52 + 43 = -20
31 - 22 + 53 = -22
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2
(1;Y1), (2;Y2), (3;Y3) . :
) ;
) ;
) ;
) ;
) ;
) ( ) ;
) .
2.1 (-2;4), (3;1), (10;7).
2.2 (-3;-2), (14;4), (6;8).
2.3 (1;7), (-3;-1), (11;-3).
2.4 (1;0), (-1;4), (9;5).
2.5 (1;-2), (7;1), (3;7).
2.6 (-2;-3), (1;6), (6;1).
2.7 (-4;2), (-6;6), (6;2).
2.8 (4;-3), (7;3), (1;10).
2.9 (4;-4), (8;2), (3;8).
2.10 (-3;-3), (5;-7), (7;7).
3
3.1. , (2;-2) , +1=0.
3.2. , (2;-2) , +1=0.
3.3. , (3;1) Y+5=0.
3.4. , (3;4) , (6;7).
3.5. , , (3;2) .
3.6. , (-4;2) OY.
3.7. , (2;4) (-4;4) 8.
3.8. , (2;-2) (2;4) 8.
3.9. , (-4;3), (1;-2).
3.10. , +6=0 .
4
1(X1; Y1; Z1), 2(X2; Y2; Z2), 3(X3; Y3; Z3),
4(X4; Y4; Z4). :
) 1 2
) 1 2 1 3
) 123
) , 4
) , 4
) 123 4
4.1. 1(7;0;3), 2(3;0;-1), 3(3;0;5), 4(4;3;-2).
4.2. 1(1;-1;6), 2(2;5;-2), 3(-3;3;3), 4(4;1;5).
4.3. 1(3;6;1), 2(6;1;4), 3(3;-6;10), 4(7;5;4).
4.4. 1(1;1;3), 2(6;1;4), 3(6;4;1), 4(0;5;6).
4.5. 1(4;4;5), 2(10;2;3), 3(-3;5;4), 4(6;-2;2).
4.6. 1(-1;2;5), 2(-4;6;4), 3(2;1;5), 4(-1;-2;2).
4.7. 1(2;-1;9), 2(1;1;5), 3(7;3;1), 4(2;6;-2).
4.8. 1(1;-2;2), 2(-1;-3;4), 3(5;5;-1), 4(2;-4;5).
4.9. 1(1;1;3), 2(7;1;1), 3(2;2;2), 4(4;1;-1).
4.10. 1(3;1;2), 2(5;0;-1), 3(0;3;6), 4(3;7;10).
5
, . .
5.1 2 + 2 +6 4 68 = 0
5.2 9 2 - 42 - 18 16 - 43 = 0
5.3 42 + 52 + 8 100 + 484 = 0
5.4 32 - 62 - 12 108 - 492 = 0
5.5 22 + 92 + 12 108 +324= 0
5.6 32 - 102 - 24 100 - 172 = 0
5.7 42 + 92 + 32 72 + 172 = 0
5.8 52 - 82 - 50 48 + 13= 0
5.9 62 + 72 + 60 28 + 136= 0
5.10 72 - 62 - 84 12 - 288=