u **rfi c ci H» 



d^ti6 ! '#wlicSJ»Htt' •'^■dasf varfabiles itttloinaitramj 

 Scopus autern huius Diflertatioriis praeci^nu^ •■ is *e$: * 

 vt Methodus ifta perfpi.ciievexplicetur. Ex natura 

 funjftionuiTi .« quae . binas variabiles js ej; « inuoluunt . 

 C-^lr^itSr , 4ni<^f ii P aliquji hunismWi^fucrfe 1 ftuA 

 ctio , fitque 



fimiliq^fcSTiOjfe vjtcrius ■procedendo' 



, (lf ) =fd z (^I) ; (*LJ) == rf , r (JLp etc. 



FJoc prificipium, Tjra praeienti negotiq , ytlle eua/flt, 

 ^nan dojuijcljo P. ita efl comparata , vt ca(u parti- 

 £U,la,ri , . q.uo poft integrationem ipti z cejtii§ vatk 

 Vjt|pate js — £i, tnbuitur, S—f?dz abcat iri Tun- 

 c^: f iope,m foBus vari.abilis «, ium ,enim 'inte^rati6n« 

 fypra memdratae loctim liabebunt, moJo pbrr fingii- 

 ias, pinatur s zz #. "Simili quaque modo exnatfr- 

 ra fundiqnum binas vambiles inu^ltientium , c\eM~ 

 :itur qupcj fit JS 3 uzzfd z/P ftu> \bi in inregcja,- 

 ibus fS/d'u\ /P ^ft variabilitas foliUs s fpeclaiar ^ 

 tum VcTo in integrali /^f ^ f?dii varidbiiitas ioiiift 

 «? : rta#*vero iuTegrattoTgs rerhti q'uoqtis porTunt^Vt 

 -WTd u f S du ~fdz fd ufBdu m fdufd wj&dv 

 ±? fdz fdu fd u fVdui <^uodft 'nunc P eitfermtaaH 

 ^tfancT/io vtirkbilium s z et % , vt fofnTblad integlda- 

 ,^,/P d z valor , certo cafiT pnta is ±?a, , commode 

 cxhiberi queat per quantilatem S,\ quae ilt fUnct-ifo 

 ibltus' variabiiis u\ pro ,eodem cafu z fi&ifcj foijmttifl- 

 -ittfri integralium f dz f¥du ,:f dzfduf? d u^- 

 iore* actciOTiiwri po^nt>, oiD^© faGrtwlae >{&4m> 



/V« 



«'1 1 



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