450 Journal of the Asiatic Society of Bengal. [-Tulj, 1907. 



1 p ^ ilF 



"^"■'^')-^''''-i*] 



-.\.I L_ r ... _ , ^t 'Jf 



■■•(i+— i)'^"=; 



(^TTTl""-'' 



(7/A 



dPn-1 ,- 



— . v /*' — 1 f/^ 



d^L 



1 r, „ , At/p«. 



•[](/>^«-i) 



w(?i+l) L -^ '. J/U, 



[(2n-3)P„_2 + +] v/^^TTid^ 



dfi 



• • V 



Subtracting, we get, 





dP„ - i 



|(2«-3)-,,(„-2)|.,T„- 



2 



(/.»-l)^' (2«-l)P4., +(«-3K».-l),J„_2 



3 



(m»-1)M (2».-1)P„., 



(?i-i)(»-3) n 





^ (.,-l)(>.-3) ^^_ ^^ .. 



n(n-2) 



1 



« + 3 f 



»/« say. 



dPn „ ..3 



a/A 



• (1 - f*a ) * (Z^ - ( I - ttS)l P„ + 3 ./„ from A 



