Jj6 



B 2 = a 3 B i — a* , 



,Br +D i 



B 2 = a 3 B i — a* a -*- — - 



C 2 = a' C i — a 2 a 



Dz = a' D 



i — ard 



z 

 Ci +Et 



&c. 



P 4 =^(A[+Pi)- fl «a'- 



a 



Q 4 = a'(B i +Qi)- a'a'' P ^ - 

 R4=a'(C+R 1 )- aV ^-^ 



2 

 &C. 



P 5 =a 3 P 3 -aV(^H-^l) 



2 2 



o — jo » ' 2A1+C1 2P3+R3 2* 



it 5 = a 3 J\ 3 — a a ( — •+■ ) 



N 2 2 



« • c 1 // Cl • + - El R 3 -+-T3 

 S 5 = a 3 S 3 — <zV ( 1 - ) 



&c. 



on aura (Art. LXVII.) 



R= J - (A2 ■+- B2 cof. 9 -+- C2 cof 26 -+- D2 cof. 3 6-f- &c.) 



m 



~+- i -y (P4 ■+■ Q4 cof: 9+R 4 cof 18 -+-S 4 cof 36 + &C.) 



A 



-*•- l J y (P5"^Qj cof. 9-r-Rj cof. iQ-fr-Sj cof. 3 e-+-&c). 

 Maintenant on aura 



- fin, 

 If 



