= (x 2 x 1; y 2 y 1; z 2 z 1)
× = ï ïï ï cosj | ´ = | |
: 1) × = ï ï2; 2) × = 0, ^ ; 3) × = × ; | : 1) ; 2) , ïï | : 1) 2) 3) , |
: | : | : V = V = |
+ + = 0 | |||
k α | , b | ||
, k α | |||
a b | |||
, | |||
, | (→) |
1.
2. , ,
3. λ
4.
5.
6.
: + + = 0
R | |||
a , b (; 0), ( a; 0), (0; b), (0; b) , F 1(c; 0), F 2( c; 0) e , | |||
a , b (; 0), (a; 0), , F 1(c; 0), F 2( c; 0) e , | |||
F ( /2; 0) y = p / 2 | |||
F (0; /2), y = p / 2 |
|
|
:
, = ,
, >0,
, <0,
, = 0.
:
() ();
;
.
, , | , . | ||
, | |||
Ox, b , z. , | |||
, Ox, Oy, Oz. | , = , |