( t0^8 ) 
cede quoad libuerit. Turn erit « 
, a-\-sh , j ^ A-^tB 
f o 1 a-Tst? , 
+ &C. + &c. 
at- 
que ultra duos pritnos tetminos hujus novse Seriei ra- 
re opus erit progredt. ‘ ’ 
Ut fi defideretur valor Seriei — + — h 
1.2 ' 3.4 5.6 ' 7.8 
&c. collige primos zi terminos, quorum fummam 
reperio fore68i3, 8410, 1885. Termini proximo ad- 
dendifiint a=, 0005 , /3 =,0x304,8309,1 787, 
^ =,0004,43 i6,x4i I, ^=,0004,0816,3265, &c. Hinc 
fit r = i proxime, & =»ou 7*6449, 6182, 
a = — ,0000,0017,5096, ^= — ,0000,0014,7410,' 
^ = — ,0000,0012,4986, &c. Unde ^ = i prope, & 
.4X^-i^ = — ,0000,0141,8111, quern propter fignum 
negativum fubduco ab a x— &remanet, 0117,6307, 
A [5 
8171: hie additus fummse primo invents 6813,8410, 
1885, dat pro fumma totius Seriei numerum 6931, 
4718,0056, qui juftus eft in nona decimali ; at ante 
duas hafee corrediones fumma erat jufta in prima fi- 
gura foli. Si animus fit propius fcOpum attingere, 
pergendum eric ad approximationes fequentes. Si^er- 
mini Seriei diverfa habeartt figna, conjuOgendi funt, ut 
omnes eadem tandem habeant, ut in Serie i — f + f 
“-l- i — &o conjun(ftis terminis ea evadit 
h &c. Sed hie notandum eft 
quod difterentis a, h, c, e, &c. ut & A, B,C,D, c8rc. 
colligi debent fubducendo quantitates antecedences dc 
fubfequentibus. Et in omnibus hujufmodi Seriebus fi 
pi 4, r, reprsfentOttt tres terminos' ofcdifie ft^emes; p pri- 
mum. 
