(93) 



cof. '^ 



idcoque s — ^ — — , vti inuenimus , fiue erit etiam 



^ 4 cof. I Cp' ' 



f cof. (}> 



2 1 1 -+- cqy. (J) ) * 



^^^' §. 10. Sit nunc « zz — 3, orieturque haec feries in- 



finita : 



1 — 5 cof. (J)-»- 5 cof. 2 (J) — I o cof. 3 Cp -f- 1 5 cof. ^.(p— 2 1 cof. 5 C|) etc. 



cuius ergo fumma erit — -'-—- • Haec autem expreffio 



8 cof. l <P^ ^ 



porro redicitur ad Iianc 



^ _ I _ __3__ -_ t __ ___3___ 

 — ^ ^ 8 cor.2 <p"- ' 4 (i -+- cof. Cp) 



ita vt quoque fit irzrii^i^. 



§. II. Simili modo fequentes adipifcemur fummationes: 



1 — 4 cof. d) -f-i o cof. 2 (b — 20 cof. 3 (J) etc. = — o -^HJ 



' i6cof. -^Cp^' 



1 — 5 cof.Cp-hi5 cof. 2(p— 35 cof. 3 (p-+-7ocof.4(petc.r: , ^"^'^^ ; 



3 2 cof. l (p' 



I — 5 cof. (I)-t-2 1 cof. 2 (p— 5 6 cof. 3 4^-+- 1 2 ^ cof.^-Cp etc. = -H^^Ili^ , 



(^4. cof. 2 (p^ 



I— 7Cof.(l5-H2 8cof.2(p— S4Cof.3(I)-f-2iocof.4(petc. = — ^" '''^ .. 



128 cof. B Cp' 



Euolutio cafus 



quo n z=zl. 

 §.12. Hinc ergo formabitur fequens feries infinita: 

 - iH-|cof.Cp-^^;cof.2(pH-l^3cof.3(})_Lii||_jcof.4Cj)etc. 



M 3 cuius 



