. , , .
.2 -
.3 -
(), .. P1-n=P1*P2*P3.*Pn, P1-n n , P1, P2, .Pn i .
: P1-n=1-(1-P1)*(1-P2)*
*(1-Pn).
- (.2) :
P1-4=P1-2*P3-4=[1-(1-P1)(1-P2)]*[(1-(1-P3)(1-P4)]
- (..3) :
P5-8 = 1-(1-P5-6)(1-P7-8)=1-(1-P5*6)(1-P78)
, 0.9, . lt£0.1 c , , , , ..
(t)=-l=1-lt
: l , 1/; t , .
:
lt=1-(t) l=(l-P(t))/t
:
= l* -l=l(l-l*t)= l*Pe
.=0.998 t0=10 : l0t0=0.002, .. l0=0.002/10=0.2*10-3 1/. 0=1/l0=1/0.2*10-3=5000 . , =20=2*5000=10000 .
:
= l02* t-l=0.04*10-6* t-l,
:
l=/=0.04*10-6*t/(l+0.2*10-3t).
- . - . , , , , .
. , . .
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80% . , , . - , . , .
, . , , , .
. , , , , - .