= (75) = 



hi 7T C. — I • I| -f- *M* 7T C. —\ . fa£&* , ^Lf-f 



2 . ^ 2.4 a 3 2.. 4. 6 2. 4 1.2. 3. 4 o ' 



tF£ *_ . ■*■ '"• 6 " ! . _£ -h '■ J ' 3 -f'4ffff 



r. j 



2. 4. 6. ?S 2-4 1.2. 0.4 «7 2. 4. 6. *. 10 2.4 



1Q - ? - s - 7 . _£f . etc. 



1. 2. j. 4 c 9 



qui termini reducuntur ad fequentem exprefTionem : 



^ 1. 3 1T b+ C fl j 3. 5. 3 C_C ., 3. 5. 7. 5 C* , ?. 5. 7. 9.7 ^ C^ _j_ gtc^ 



2. 4 " 2 4 a* ^ * 2 c a 2. 4 a+ 2. 4. 6 a s 



§. 17. Ifta feries feqnenti modo in clariorem ordinem 

 redigi poterit: 



~L3 .2L^L C (1 — bl. c c _,_ _7_5 t c4 _ 5. r. 9. 7 m c« etc \ a 



2.4 8 fl3 V 2 (11 2. 4 . a* 2. 4. 6 a s * 



Ponamus hic breuitatis gratia — =: x x, atque faciorem commu- 

 nem — h±..%b*£ multiplicari oportebit per hanc feriem: 



s — 1 _ L2 X x -+- £—_ x 4 — 5 - ■ • 9 - 7 x 6 -+- 5 ^_i_ x* — etc. 



2 . 2. 4 2. 4. 6 2. 4. 6. 8 • 



Haec feries iam fatis eft reguiaris, et nifi poflremi fa&ores nu- 

 mcrici adeffent, eins fummatio in promptu foret. Ad hos igi- 

 tur fa&ores tollendos vtamur integratione, ac reperiemus 



fs d x — x — i x 5 -+- 5 -il x s — —— x 7 -+- ^^4 x 9 — etc. 



■* 2.4 2, 4. 6 t. 4. 6. 8 



Nouimus autem effe 



( i -+- x x) 2 — 1 — li.v + 5 -^.v 4 — — l— x 6 -f- etc, 



2.4 2.4.6 



_ 5 

 vnde patet forefsdxzzzx(i~\-xx) 2 , hincque differentian- 

 do colligitur 



S 7 



s _- ( x"-_f- x x) s — 5 x x (1 ~\- x x) % fme 



1 — 4 x x 

 J_: = . 



(i -+- x x) s 



§. 18. 



