360 



2B 



or, if we let -=^ - 1 = x, this can be v/ritten as 



(4.9, . i^ . f g L-4_ . 



° ^ (2n + 1)^ - x'^ 



The series on the right can be expressed in terns of 

 tabulated fujictlons as follows; 



f (x) = 2 z: ^~' ^"^ ^ 



(2n + 1)'^ - x"^ 

 (4.10) 



and we have 



$'(0) = - ^(f(x) + los 2) 

 (4.11) 



^ T 1 



* Note, that if D — > oo , $ (0) = - 73^ • By differentiation 



t tm 



^ we find that 



(4.12) 4: = -lf'(x)|g = -^f'(x). 



