559 
The number of values a; being six, we have six different terms 
Wa, 
In this case, having 
Ina 455, a, == 10,4, == 20 
530, s,=170642, »v=n+19 
we obtain 
oe i ee eu! 
2 ESOC es MO 
or 
ai - 
48000 
For IW, the equation (6) 
] 
E + 762? + 1901 n? + 17366 + 41930 “a 
or 
U sss). 
shows, that also in this case there is only one root v—=— 1. There- 
fore W, reduces to 
a = (—1)" ent t 
TC ele (Ie 9) (1—e-19) (Ie) (() 
1 
or (—1)" multiplied by the coefficient of in 
nt—Iq(1 He!) —lg(1—e- 2) —lg(1 He) —Ig(1 —e—1') — lg(1—e—20), 
NE 
Developing the logarithms in this expression by means of the 
equation (a) and 
lg (L+e -) = lg (1—e- 27) — lg (l—e—?) = | 
ee BINAS B (0) 
Re mm me 
we get 
2 hbe En 
EEE IOO ene Tes 
Hence 
ge (15»* — 7274) 
7 48000 
or 
(CD (15 2 4 570n 4- 4687 1). 
* 48 00 ; 
For W, the equation (6) is 
1— z*=0 
or : 
Le 24—0 
37* 
