-
()
P ;
ci ();
;
1, c ;
n, c .
:
P Pn, Pn-1, Pn = Pn-1 n.
Pn-1 Pn-1 = Pn-2 n-1.
Pn-2 = Pn-3 n-2
...
Pi = Pi-1 i
...
P3 = P2 3
P2 = P1 2
P1 = P0 1
P1 = P0 1 , P1 1 P0 = 1.
, :
( ) P0 = 1;
Pi Pi-1 i.
( ). .
, :
Pn = (((...(P0 1) 2) 3) ... i-1) i) ... n-1) n
:
Pi;
(Pi Pi-1);
Pi.
. P(n+1) P0.
(Pi) (Pi-1), , . Pi-1 = Pi, .
, . , (P = 1), , ().
(8.4) .
, 3,7 8,1 0,3 . 1,5. .