v ,
v
v
, .
, ,
D = (*)
, ,
= (+b), (**)
() , ;
, b , .
( )
g = 100D x / x N
D ;
xn , , D x;
xn , , () , , . , xn . , 30%, .
(, ) , . , , .
( )
g = 100D x / x,
D x (*),
(***)
D x (**).
( ) ;
, , c = (b + a/|xK|)100; d=100a/|xK|.