( 9,).

9.

 

, ,

,         (20)

.

. f

,         (21)

. f = 0 = 0. , (8). , , (, 10,) .

10. - : , , .

, , (. (10)). , , f f .

3

.         (22)

( 9,). , ,

,         (23)

. , .

. , . = R / R1. , 9, () .

3

.         (24)

, f , .

.         (25)

, (), , ( (22) (24)). ,

f f > f .


, " " - , . , , .
, , . , " " " ", , . FAQ .

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