) ^i ( V4^ 



§. p. Denique Theorema noftmm (IV,) fcqucnll 

 ratione habetur exprefliim: 



2 /• d0V ( i-f--5PCQf.(t)-f-e- j I y- d^ V( i-+-iPCTf. $-4-g n 



f^ li'K (f V ( ' -H I P m/. -f- g' J ■ r d ^f I -4- e cor. <t> )* 



( iH-ecoyV(p)(eH-(;j/. 4)J ' •' 1 «--t-coj. £|>j- V (»"-*•» *£0J. ;J -4-e* ) • 



quod fe-quenti ratione demonftratur, 



"• ( i-i-ecoj.{p)(f-t-coy. (J5j «-+-coj.(p i-t-e«/.^ 



I . ^ftt. <^ J V(i-+-2e co/.tt)-f.e») KJn- 



"^ . -^- f CDJ. (^ "' 7+7o/. > "'"'- 



gt J /in.QV: t+ ^ec or.)$ + e'' ) g^ d (h V^ ■ -f- ' ^ caf. $-».p?^ 



( i-f-ecoj.(J)) (f -f-coj. (p) ' T^ ,( 1 -f-ecoj.(pJ' 



e' J^nn..<$>^ 



(tf+co/.tpj'V( '-+-iecoj.Cj>-+-e-J * 



Porro habetur 



tt(pV( i -+-if<:o /. (})->- £2_5 ■*' dpjh. ^ I 



:(e-+-co/.{J))- Xe-+-cojr^;W( 1 -+-3eM/. tp-t-e') 



, — dq^f.-+-»co|-.(p)« ,■ 



ve-f-cjj.4),- V i • -(-if cj/.4)-+-e- ; ' Miiiu 



d tP V ( 1 -f- 1 p c o/. f P-t- f ' ) — e^d (Pi'i.(p- -f-dCp ^i^f co/. (J>2« j»(. 



(e-^coJ.<p)' (e-f-co(. (p )W( '-f-"i"eco/:<p-HO 



f^dip V(i-t- 'f C 3.( P-He-) ■ d3)V ( I -f-<<'tQr.lP-4-e') 

 ( 1 -+. e co/. (p )« ^" (e-Hc^y. 4))" 



f'd(P V( i-f-?. eco/ . $-+-«'^) . P» d <P fjv . (pt-(-j (p (_2 .+. ^ oor (J>)i^ 



.( .-t-ero/. $j» "♦" .(e-+-co/ <J))» V( i-<-jecoj.(p^e') » 



vnde veritas noftxae propofitionis omnino eft njanifefta. 



f. 10. His igitur praemifHs, iam ipfum negotuim 

 adgredi licebit, "vbi <juidem primum dilpiciendum eft, quo- 

 modo differentiale d zV -~~j- comparatum efle oportcX, 

 vt ad formulam ^ Cj) V Li^i^^^^fll reduaionem admit- 

 tat. Breuitatis autem gratia in differcntiali propofito , lo- 

 to •nunTeratoris V -[1 -j-mzz) vel V [mzz — i) litteram 

 Z adhibebimus et pro denominatore V ( i -+2nzz^ vel 

 1/ [n z z — -I ) -Httcra Z' in vfum vocetur, -quafe pro cafu 

 praefenti dum differentiale </ 5;. |r ad foKMm 



■ iif dN V( '-^ »eco(. (p-+-e') 



— Cs^ I a rcdu- 



