l62 



^ + [(» Af-> + m B^-^ + l C^-^) (^^') 



-f. (^"0^-^ + k-'C^'"^ + A C^^'^^) (f ) 



_(„ A(-)_^^B^^.)_^ZC(-^)(^) 



_ (^/-A(-^ + m-B^-^ -h rC^-^) (g)] (I-:) 



^igy-C^''^^^k''C^'''^-k'C^''')-kin'''A.^^^^^^ 



5 16. On a maintenant Af^'-^B^^-^'^'-A^^'^''>B<^'^-> 

 =A^A-(©(^^)-(^^)(^))-A^^A-((f^)a-(^^^ 



tA^^'\^i;è-afe)+A-^::?(^^ 



