258 



since the absolute values of the series occurring in the right hand 

 member is less than the sum of the convergent series 



m=h-\-l ^m + ^ 



If thus appears that we may consider y„ to be the required 

 deflexion ?/, supposed n be large enough and k' <^ )/,+! ■ If g is, 

 after h, the lirst value of m such that Pm j^ 0, the condition ^'<^/. 

 must been satisfied if we wish to replace y by ?/„ for large values of n. 



