84 



Mr Jarrett on Algebraic Notation, 



But 



im An =\- .n'; 



a»-= 1 + -.(a-1) + 



m nu- , °? m'+- f, »« ,^ ) 



Also ri'u' = {a- l)" - "S", — - 



^ «'^' o. (-1) 



— .[2_.|n_(3-*); 



8—1 t-{-2 



an = 1 + -.(a-1) + 



m (a-1)' 



n (2^ 





m 1 C.9 (-1)'"' 



n [2 



2 



,5' 



s-1 



12 .ln(3-s) 



s— 1 <+2 



7/ 



Put the coefficient of —-^Ai, 



= OT - 2M. --ix + n . -. ( -2) 

 = m - — /^ 2 n . • ,7L - w • i; ^ 



= |7H -I-.,- .SMn(3-s).l2 /, ^\' ■ ^ ; 



ni 



an = 1+ —.(a-1) + 



7« (a-1)" 



n_ (2 



