53 
k a V mînMiie pendentem. Etenim ArcTg membri prioris con- 
tinua est functio ipsius v [u qualibet tali quæ lieic considera- 
tur) nec minus summa illa arcuum ”ArcTg” in membro poste- 
riori *) ; ideoque alter ab altera discrepare nequit tali quadam 
functione ipsius cui non nisi integri contingant \alores nu- 
merici per n multiplicati. — Et quoniam, dum r = o, /1 = 0 est; 
pro certo jam statui licet esse 
/qv_^-v \ V / r . V \ 
(61 AfcTgi Cotu jzziArcTff I ArcTa ArcTi^ | 
— I ArcTg-- 
V V 
ArcTg — 
( 
ArcT 
27 T-H 
V 
2n+u^ 
0 ArcTg ] 
37 T'Tt 3 ;T+tl/ 
&;c. 
*) Aam positu 
f(i>) = ArcTg- — ^ArcTg — — ArcTg ^ 
u \ n-U n U J \ 2.11-11 .^iT-\-U/ 
quoaiain series Illa membri posterioris v quålibet convergens erat [secundum æqu. il- 
lam post (Ö)], habetur — « denotante numerum perexiguum — 
TArcTg^ 
>}; 4 - e v f 
ArcTg—- ArcTg-J^ 
It -u 
It ■\-it 
j — ArcTg — i j — ArcTg + ArcTg ' 
l nj f tt-u tt + u. 
V 4 - /! T) 4 - * 
Arc - ArcTg-I- 
ntt-ii 
V 
— ArcTg— — -h ArcTg 
nn u 
v 
&.C. 
tiTt-ii ri'tt + Il 
ex q«® patet non modo in tantum perveniri licere , ul summa terminorum sequen- 
