494 ON THE SUMMATION OF SERIES, 
from equation (17) Ex. 2. And by taking # = 
infinity, the above equation will become 
z (es=iyas)= 2 (ons) vi | om 
1 l 1 
ao 1 
mt nye A = 2 hay )+ &e., &e. 
ee l ede. 1 1 
therefore Bas =o 9 a Gee aey 
; 
1 ee 1 1 1 1s 
z Ares.) Sey CuRer Cae oh 
Oy 1 ( x 4 Geo 2y + 8 (aay (2y)) 
1 1 1 95 1 1 a 
— T6 (ay iF ~ yy )+ ey = ei 
If we now take y = 6 the above equation will 
become 
6 
~ 1 1 1 ey 
2 ge ye= =: eons )+ 7 ei & i 
1 uh a 1 Ti feud Or a 
Fe eral rPER aon Tn + Se 
— 6532107 +.0416666 — .0018939 +.0001650— 
.0000012—=.6931472 which is true to the last 
place of decimals. 
