1.
.
. .
2. .
. .
3. B D ?
. B =2 D =8.
4. ?
. .
5. :
1) ,
2)
3)
. 1) (2; -3; 6); 2) , ; 3) .
6. Q, (4; 1; 6)
. Q (2; - 3; 2).
7. Q, (2; -5; 7) , 1(5; 4;6)
2(-2;-17; - 8).
. Q (4; 1; -3).
8. (5; 2; -1)
.
. (1; 4; -7).
9. Q, (1; 3; -4) .
. Q (-5; 1; 0).
10. d (2 3;-1) :
1)
2)
3)
. 1) 21; 2) 6; 3) 15.
11. ,
, .
. 25
12. , (1; 2;-3)
. .
13. :
1)
.
2) .
. 1) 3; 2) 7.
14.
.
, , .
+ + = 0 (14.1)
, , . = .
(14.1) 0, 0, . (0,0), (14.1):
0 + 0 + = 0.
(5.1), ,
( 0) + ( 0) = 0 (14.2)
, (0,0) =
, .
+ + = 0 , ¹ 0. , .
= 0: + = 0 , .
= 0: + = 0 , ( = ).
= 0; = 0: = 0 ( ).
, (14.3)
= - ; = - . , , . .
|
|
14.1.
AD.
. AD BC, .