28 
MEMORIAS CIENTIFICAS I LITERARIAS 
23. 
1 
A(x-l) 
x 5 +x 4 +2x 3 + 2x 2 txf 1 fx 2 + l)‘ 
, B (x — 1) 
x 2 + 1 
1 
. Y — 
4 x 2 + l 
x + 1 1 
4- -77 arc tg x 
1 -j- x + 1 
4 i/FTT 
(Gregory, 263; 
24. 
X 3 4-X 2 +2 
x 5 — 2 x 3 + x 
d x 
2dx dx 
4 
3 , 1 , 5 
- dx —dx -- d x 
4 2 4 
x (x-1) 2 x-1 (X4-1) 2 x 4- 1 
,y = 2L x — — 
x— 1 4 
3 L(x— 1 ) +• 4 -L(x + 1). 
2(x + 1) 4 
25. 
2 x 2 + 1 
ABC 
4_ + 
(x — 2) 3 (x+-3) 2 x— 2 (x— 2) 2 (x + 2V 
D 
E 
X4-3 (x-3) 2 
2 x 2 + 1 = A fx-2) 2 (x + 3) 2 
4-B (x— 2) (x + 3) 2 
+ C (x + 3) 2 
4 - D (x -- 2) 3 (x + 3) 
4-E (x — 2) 3 . 
