Facta enim divisionc per ces;. / cp et iniiltiplicaiido per 

 (i — ncos. 0) ~^~ habcbimiis : 



~i- h COS. — b « cos.0^ 

 H- C COS.(|)= 



ùnde statim conciuditur Xorc : 



h=z2anz=z2'K(X-r- i) «', 



c z=b/i — an^ — X(X4- i);i2 — X(X4- i);i=(n* — j), 



quibus siibstitiilis in termino illo ultimo, binisque prioribus 

 terminis additis^ fiet : 



! ) [f i -f- X (X -4- i) r.-] cos.i(î> 

 ' ( I — n COS. IpJ^ 



X n [i — r. (X-h I } 7;-] COS. $ tos. i (> 

 ' (i — nc'^$)'>^ -+- ' 



X (X-+- 1) n- ( 1 — n~) co^. ■$* cos. i ^5 

 (1 — n coî. (J))-^ ~t- - 



Facta nunc comparatione nanciscimur valores 

 / =1 il 4- X (X-f- 1) n^ , 

 g rr — X ?i (1 — 2 (X + 1) n^), 

 h =z— X (X-f-i)/i' (t—n^), 



qnibiis inventis aequatio differentio - differentialis quaç- 

 sita erit : 



[u-hX(X-t- i)/i']z-?i [i_o (Xh-i);z^] I^^ _n^(i^n'') ^^ = O 



in cujus membio z duplicis generis termini occurrunt, 



Mémohis dt iAtad. T.V. ^^ 



