(1) 11.2. , :
a + n + s = A = const.
, :
= , = r× a s m(x), (1)
= k (xn x) + b a g s m(x),
B = a A r A rd.
:
1) = 0; = 0; = xn; = A; (2)
2) ; ; (m = m()),
k (xn x)(r + m(x))(a r) + B m(x)(b gr) = 0; .
, , , , , 䒺. , > 0 > 0 > ; > 0 a > r. , Vn (n) :
Vn (n) =
n *: Vn (n) = r, (1), n < 0. (2).
, a > r i < , . a > r i > , , , . , .
a < r , . , , , r a.
, , . ; , .
. .