Pl2 = 



= -A 



i?13=+A 



&c. 



C 1 or related Average 



a/J \/\> V\ 



>> a/|a/S 

 a/I *> VI 



vi v\ 



203 



&c. 



= -~A 



A. _l 



12 s/% 



= 0. 



&c. 



The determinant A, thus determined in terms of itself, may 

 be written : — 



i-A 1 i A 



12 ' 12 V2 ' 



1 1 a 1a 1 1 A 



i2 7! A ' 6 A > -\~r^ 



a 1 ! A 



°' -I7I A ' 



o, - 



1. 1 1 A 



4 A > -47I A 



1 1 



4 V3 



A. 



To determine A we have 



A = A 3 x 



1 



1 1 



r\ 





6' 



4 >/§' 









1 1 



4 V6 



1 



r 



1 1 



4 v/3 



= A3-L 

 576 



r\ 



i i 



1 





o, 



4V3' 



6 





