4^ METH.INTEG. FOR/I/. niFFEREXT RJTION. 



-* -4-& !t. -4- ctC. ~ O 



aJi |- ■ i^ — 1 ' rr * »-''~J r* •■i'1-J 



atqiic 

 «;•-(«-+- i).f— " {nr-[ti-[-i).\)-\~ % (;/r-(«+ 1 ).f)— ctc. = o 

 quae diinc cxprcnioncs fi coiiiiindim fubtrah.uitur a llipc- 

 riori , tninsmutabitur ifta cxprcfl"io 



(Tlfjr V. — r r» "• r» ~r* ~T~ '-'•'-V 



quae cum diuidi queat pcr r — s cmcrgit : 



fbr (r -S-f-rl: -7^-f-ctc.) 

 fimili modo ifla cxprcfllo : 



, — jj-i-sJ j«-t-j$— crc. 



fadis (iibflitutionibus tranfibit in hanc : 



jii; (r — 5'--t-jj — j»-t-ctc.) 

 Qiiarc tandcm pro §. 3S. habcbitur : 



A-;B-+-;.X-; : D-h ctc. 



(^^ = ^ - f^ - f^ -H ctc. 

 A-iB4-;,C-;,D^- ctc. 



— s 



f^)i-^_ ji^_|_;T; _;?_!- ctc. 

 Hisquc inuentis cft ^ — ,77,-? — (Ti?-) ^tquc 



§. 40. Etfi hic qu;Hititatcs r ct .c habcant valorcs 

 imaginarioii , t.ui.cn in AaloriUb pro ^ ct Q ini:iyinana 

 fc dcfliiiunt , at<]UJ oricntur valorcs rcalcs. Tonatur cnini 

 prininm ^r du(flum amborum dcnuminaiorum 



