-
7
= , (20 )
= , (40 )
= (60 )
D = , (60 )
E = -. (20 )
F = , (40 )
, , 7
G = 70
18 ()
.
2 1 , G. , . , G. , . 1 .
2 . , .
, G. F. 2 , G F . . 2 1 2- , .
. , . . , . , , .
= = ( )
= G ( , )
= ( )
= ( )
= ( )
= G F ( )
= G ( )
= F ( )
= + F ( )
= A + F ( . )
= D ( )
= , D ( , , , )
