5>o DE QVANTI T A T I B V S 



pofito zz~ i, hoc commodt affequimur , vt in for- 

 mulis integralibus vbi folus angulus u pro variabiii 

 habetur, ftatim ante integrationes ponere liceat zzzzi, 

 hoc autem faclro erit 



2 2 COf. IL * Vi 2 — 2 Cflf. U 



tum vero porro 



f? duzz A-\u 



fduf?du — B + Au — \uu 



fdu fdu f?duzzzC-\-Ru-\-\Auu — ~u 



fdu fdu jdu /PfcD+Caf3«« + JA« ' -Uu 

 at pro formulis, vbi eft q, calcuius non tam concin- 

 ne fucceuit - x erit enim 



Q _ s cot. | w 



fQd uzzzl fin. I u. 



fdu fQduzz/dulfm.U 

 quae formula cum omnem integrationem refpuat r 

 vix vlterius progredi licet ; interim tamen erit 



fdu fdufQdu.—fdu-fdul{\xu{u 



fd u f d u fdu fQ_d u zzi fd u fdu fdul fiu. \ u. 



§• 37- Qi*od ad priores formulas variabilem z 

 inuoluentes attrnet, per notas- reuudrones elicitur 



r \' dz _ rd_z i vdz — 7 „ r? dz __ r_d__ i z 



vbi prius; membrum Izf? dz euanefcit. pofito zzzz i, 

 tum vero 



r ds r v d % — ri% rdz rsdz. . r vdz (_0* 



' z J z J z ' z J z — ' ' J z 2 



quibus expreflionibus vlterius exhibitis colligimus fore 



P' — 



