( ).
, . , , - . .
= + . (5-1)
: = ;
;
;
;
= ;
, ;
;
;
.
(5-1) :
= ( + ) = = (5-2)
= (5-3)
= (5-4)
, ( + ), (..) ,
: (...).
(5-4) (5-6)
= (5-5)
= (5-6)
= i ,
= , (5-7)
: ( ).
, , (5-8)
= , (5-8)
: , .
, , :
= /2 , (5-9)
: .
, .