Opuscula. 2^5' 
2.* — + B= 2 r. Addatur fecunda prinise, & prodibiS 
2 jBmr 5 feu B==^r. Quo valore fubftituto duae aEquatio« 
nes fient i.* - -4 + — - — r , 2,^ = r , qux funt 
omnino idemticae. Quare una ex duabus A ^ A €x libito 
determinetur 5 & valor alterius prodibit « Si fiat ^ = #,€ril 
A= — J- *• ; fi A'=:o y erit A= ^r; fi fia£ A = r ^ 
A^-^-^r: fi A = r, erit = — r » Summatoriag lutem 
2 2 
qux ex diverfis determinationibus prod eunt, nTmirum 
ry,—' — Ch,cpirj,'^Sh»cpiry^ Sh.(^~ — -Ch.<f»f 
I 
I I ^ f/.(p 
ry . -j-Sh, cp i-Ch.c^ non differunt inter fe nifi perquaH'» 
titates conftantes . Ita dempta prima a fecunda fiet 
— rjy. Sh.9 + Ch.cp, qux ex theoremate acquat f r s 
fi demas primam a tertia ^ fit ry . Sh ,(p-h C h,cp =z r r ; fi 
demas tertiam ex quarta , fit — ^-jy ,b ^,94- G h. (p= r r,* 
atque ita de reljquis . 
Si propofita fuiiletad integrandum jy . (—8 h.<^+-Ch »0^ 
comparatio duas aequationes prxberef, i.* — A -h A -\- B r, 
2.^ A — A^-^- B -^r f qux fa6la additione aEquationum prove* 
nirec iB — o, feu B—o, Igitur in hoc cafu fummatoria 
non contineret terminum continentera cp , tametfi habeatur 
cafus exceptus . Attamen quum asquationes duae fint idem- 
ticx , una ex duabus A , A determinari poterit , prout li» 
buerit . 
Si formula integranda fuiifet q?.bh. 9 -|-Ch.(^, coi-' 
latio duas aequationes fufficeret , 1.» — A-^A-^B^^r^ 
2,^A~ A^B==r, & faaa additione 2 B z=z 1 r , (eu B = r; 
unde acquationes — ^ + ^z:©, 2,^ A~ A =z9 , qux funt 
L 1 idera* 
