-I- 2 -y « ( A « --i- B -y ) + ^ (tt' -H ^ -y' «' 



Cum hac igifcur aequatione fi combinetur illa §. 5. inuenta per 

 2VU multiplicata : 



s^HiyLl"— r>i,M(Ai;-f-B«) + (A«-|-Bt/) 



ita vt pofterior ad priorem priraura addatur, tum ab illa fub- 

 trahatur, hae prodibunt aequationes: 



1".) V' «' {'-^"'^T = ( A 4- B) (iv-+-uy - a^{v-\^ u)) 



4_A((z/-f ?;)*.«*) -\-Da{{v-\-iiy-a')-m' a'; 



2".) i;' a' (jjH^-di^y =: ( A - B) ((z; ^ uy - a' (u - u)') 



H- ^ (( z; - z/)* -a')-{-Da {{v - u)' - a')-m'a*i 



Diuifa priori harura aequationum per pofteriorem, fi Hatuatur 



V -\- wzz ar , v—u — as; 

 prodiblt 



dr'i\+B) (r '-r)-h^. (f' -i) + D (r-i) - m' a' 

 d? ~(A.-B) (5'-.y)+^(.y*-i;4-D(^'-i) - ^/2='^' ' 



in qua aequatione quum variabiles feparatae ilnt, ipfum Pro- 

 blema pro refoluto liaberi debet 



§. g. Caeterum ad aequationes ultimo loco allatas 

 lequenti quoque modo pertingere hcet. Aequationum (I.) et 

 (II.) cum aequatione (III.) ifta fiat combinatio: 



2 V u\ (I.) 4- « «*' ^- (IJ-) -h a (2/ -V- «). (III.) , 



eritque hinc: 



X 3 &vu' 



