1. , , , . :
(1)
, .
.
?
. =(1,2,-3),
=(-3,-6,9),
(1) , .
2. . (,,z), (. 14), , :
.14
. , (1)
, , :
. , (4,0,-2), (-2,6,4), (7,-3,4) .
. (. .) (4,0,-2), (-2,6,4), (7,-3,4).
, :
, M(1,3,1).
³, , , , 2:1, ,
,
, .
, (3,1,2)- .