VmCANL J>ARIABILEM INFOWENTES. 87 



^^ ■ — /( i4-2.vcof! A"-f.r.v)H — ■ -'-^ i— r 



4-(i+2AcoI.A.w-i-/;/;) 2[i+cibcolAiM-i-oh) 



.vfin.A.f 



^''''^■T:^-^A-r^ 



^(i-f-i/^col.Aw-t-/^/^; 2.(x-i-2/>coiAw-h/?/7J 



.vfin.A.^ 



A t;ine. ^ 



^ i-.vcoi.A.*;: 



At ciim fit cof.Awir— /& erit i-f-a^ corAcx3-hA>&rr 

 !->?'/>, ct cofA.7-f-^cof.A.':izr-fm.Au.fui.A';*, 

 Tnde erit integnilc qnaefitiim 



i_ i+^.vcorA^^I + AW ^ __ A '-'^' ^'"- ^*^ 



8 cof. A . r I - ^ A- cof. A^ + .v.v~^ 4 fin. A^ ^ ^'^"S"^";^ 



Scholion. 



§ 66. Ex hoc cxeinplo \iclemii3 geiieniliter efle i 

 -f- 2/; cof A(«7r-|- w)-|-/'/' = i— /'/'rrfin. Awfin. A a> 

 mm fi n fit numcrus p:ir, erit cof A(;;7r-i-w) — cof Acu 

 zzi— b y et, fi « fit numerus impar , erit cof A(;27r-f-a)) 

 rr: — cof A u rz; — ^. Deinde etinm numeratores in ge- 

 nerc compcndiofius cxprimerc poterimus. Si cnim n fit 

 numcrus pnr, quo cilii eft /; rr— cof Aw erit cof A« 

 ('■^?=^) = cof A 0) , et cof A(2«-;;;-i)(^''-=''i"-*---) - 

 cof A cj cof A (n-m- 1 ) (^^— p^ — fin. A w . fin. A ( ;; - ;;; - i ) 

 (^^±^ atque fin A(2;7-;;;-i) (— ;f=^') — fin. Aco.cofA 

 (;;-;«-!) (^?^T -H cof Aw. fui.A (;;-;;»- 1} (^-^J±!=^). 



Caiii 



