5>4 r>E SERIEB, OVIBVSD, CONSIDERAT, 



Qiumobrem habebitur [qdql%z=i qqlz 

 _ 25f ', -L- -^, ^ '--^ ^i^T^^^ etc. 





-+- .t.:t* • 1 + 4T7* • ♦ H- 6* • ^ 



etc. 

 f. 43. At fortalTe difficultas commodam expreiTionem 

 inueniendi diminuetur , fi tres illas formulas integralcs col- 

 ligamus. Hancobrem fumamus tertiam fotmulam Jqqdql^ 

 quae abit in Jqqdy ( n 4- ^* + >/ -+-•>' + etc. ) 

 Confideretur fbtmuh Jj^^^qqdq quae abit 

 in -fy^^-^^qqdxziz-y^^-^-^qqx-^-zJj^^-^^qxdq-h 

 (n^^)Jfqqxdy zz. -j"-+-.^^.v^ 2/r""^' ^ ^J' -4- 

 {n-^-i^Jy^^qqdq-in-^-iJy^^^qqdq : iiinc ergo erit 



Jj^-^-qqdq^ zl-^^^^-Jy-^^ qdy-\- 5^;// ^ 5<f^ 



At cA/y^^^qdy^y—^-^Jy^-^-dq^^-A^ - 



ir^ ' r.Tiirl ..' .'.'.'.^ ' ^Ih^! ^ pofitoj~i (§. o). Confequenter erit 



^^^. ac integralis qiuieliti fingiila tnembra erunt : 



Jy q q d q—U . 1 q ~ -ir, ■^ q -^'^ •f 



f/ q'dq - 1, ^q-i, Tl-^qi-[,. l . ^q-h ■ r^ ^1+'i^,- ?' 



S/qdq = n{^-[::::) + i.tH^-\:i) ^- 

 ^ . m 1 - -+- tifi-M' 



His valoribus fubftitiitis et terminis in ordinem redadisre- 

 dadtis reperietur tandem 



