refpediue per litteras X, 2 [x, v critque: 



I — m m' ^ . n ( m ' — 771 ) . . t -j-m m' — tn^ y , 



m-um' ' 77i'-|-m f^ ' vi' -t- m ' 



hinc fi ad primam harum aequationum addatur vhima 

 prodibit : 



2{i-fr)-(X-^y) (nit + m), hinc r - i - (X + k) ^•tHl , 



at ex aequahtate fecunda eft 



„,_jil^M-£nj^ hihcquc fit 



( m'— 771 )- ' ' 



{m' — mp \^^~ '^ J 2 » 



et quum fit 



m' m — \{ m' -\-my ~\{ m* — m y 

 hoc valore in aequatione prima fubftituto, efit 



4 - ( m' -V- m y 4- ( »i' — m )"- = 4 X ( m + ;«' ) , 

 ideoque 



4 -4- ( m' — m y — ( m' H- w )' -f- 4 X (/;; 4- »/) , 

 ^t in fuperioribus erat 



'.'"'-"'-1' — ( m' -^my -\- rXH-vHm^-T njl (>;j/_|_ ;;;) ^ 



hinc dcmum colHgitur 



(;« + wO (4X-i^'i^^)=4+0«'-//0^ (I -^O , 



et fubflituto valore ipfius m -4- ;«', prodibit aequatio tercii 

 gradus, quae folam incognitam m^ — m muoluir. Concin- 

 nius autem ad huiusmodi aequationem fequenti ratione 

 perucniemus; quum fit 



4 ;;;' m zr (ni' -\- my — (;«' — ;/;)' erit 



4 — 4 ;;/;«'- 4 — (?;;'' 4- ;;/)*,+ (;;/' — ;;/)' - 4 X (;«' -f ;/;) , 

 deinde ob m' — 7n — tS^-^JHL^ , hoc vaiore fiiblUtuto, col- 



hgitur: 



Yy 2 4- 



