Summation of Injinhe Series, 



35 



2 ?_ . ^- — &c. = I -f * A ; therefore the fum required — 



2.45-7 ' 



-V + ± A as before. In the fame manner we may apply the cor^ 

 je6tion in all other cafes. Although, therefore, the feries 

 I - I + I — I 4- &c. or — i + i-i + i- &c. have no determi- 

 nate value in the abftrad, yet the ^ven feries will fix its value 

 by pointing out the quantity from which the feries muft have 

 been originally produced. 



F 2 



