488 ON THE SUMMATION OF SERIES, 
av ‘ b : 
ES. (atbetor’tdeter't fo) = (at s+ 
i) 
g ng 
ales ta e +4 -S)eH$t+$+5) 
ote sete se dyer’ 
It would not be difficult to extend these cases 
to terms involving g, h, 2, &c., &c., &e. 
Ex. 5.—Required the sum of 2 terms of the 
series whose general term is ade Ue 
4¢z—3. 4zr-1 
Here, we have f (2)= pay saree ooh 
¢ “J—\ 4a—3 42-1)’ 
\ LZ) dar=+(log.(40-3) —log.(4a— 1)) — 
4z—1 III 
4 ‘| 
log #2358 (2) =- (Gets Gy) f OH 
Vise . 234" \' eo 2s. (2845.4 
(4¢—3)'  (4e—1)') ? = (4a —3)° 
2.3.4.5,4° £ ( 2:3.4.5.6.7.4" .. 2.3.4.5.6.7.47 
Ge—rp )3f (# Se ; 
6 a ERS Gael eg : 
f (@=-(E3 ~ tea) &c., &e. 
smi) MIB CPE 
