77
; (1.80)
(1.81)
,
(1.76)
W =
2
R
i
.
(1.75) (1.77).
,
. ,
, . ,
( ) .
.
.
. ,
(. . 1.49, )
:
(1.82)
(1.83)
(1.84)
r – ;
– , ,
.
,
(1.82)–(1.84) – .
(1.85)
(1.82)–(1.84)
, (1.73),
.
(1.82)–(1.84) ,
,
.
= 0 = 0 (. .
1.49, ) :
(1.86)