10 
— 
2A t \ 
+ 
4A z y 
+ 
2 rAA 
4- 
rA t 
\ 
Sin X 
+ 
fxrA l 
+ 
3rA z 
\ Sin 2x 4~ 
— 
prAj 
+ 
prA, 
— 
f*A 3 
> 
unde fore concludimus 
etc. 
[2 — fx) r A z -f 2A l 4- fxrA s= 0 , 
(3 — [x)r A i 4- 4^ 2 4- (1 4- / u)r^ I = 0 
et generatim qiddem 
(«» — 4 - 2(*w — 1 ) A m . x 4 - (w — 2 4 -/x)r^ n . 3 = 0 , 
ex qua aequatione una cum ( 4 ), sive 
r — h »4* = r -3 0» ~ 2 )4n-a > 
dr dr 
A m determinari debet. Mutetur ergo m in in 4- 1 in dua- 
bus hisce aequationibus, quo fiet 
(» 4“ 1 — p)rA m + 1 4- 2 mA m 4“ ( m — 1 =0 , 
dA m _^. 1 , j &A m . 1 y. t\ j 
r — b v o; 4 " I) 4 n -i- 1 — r — — (m — I) A m . t , 
afr ar 
ex quibus quatuor aequationibus, per eliminationem ipsorum 
A m+ 1 , A m . x et A m - 2 , obtinebitur 
(m • A< + I • >' 2 + <H 2 ) A m ~ 0 , . 
■ • (12) 
