124 MATHEMATICAL FORMULA AND ELLIPTIC FUNCTIONS 



H 



re i i fx i\ 2 i fx i\ 3 

 . logo; = - +- - -+~~ -+- 

 x 2\ x / 3\ x I 



i x - i 



2U+ I \X+l 



2n+l 



8. 



2;/. + i 



. x + i i ii ii 



Q. log = 2-H ,+ - -T + - * . 



& 3 



(2H 



!n+l 



10. Vi + flJ 2 log (OP + Vi + ^ 2 ) = x + - # 3 x? + - 



v5 o v5 D / 



II. 



log (x + Vi 4- 



2 x3 2 : 4 x5 _ 2-4-6 ^ 7 

 3 3'5 3-5-7 



= S<- 



V 2n+l 



12. 



X 2 2 X 4 2-4 X 6 

 -- - -+- - 



i 3 2 3-5 3 



-!)!(- 



H 



H 



