36 
MEMORIAS CIENTIF1CAS 1 LITER ARIAS 
= [ (x+b) ® - (x+b) * ] 
(Gregory, 252) 
f yx+a a,. _ 
f dx + I 
f ad x 
j x V x — a " J 
1 y X 2 — a 2 J 
xl/x 2 — a* 
x 
= arc sec — 
d 
4- L 
x + Vx 2 -a f 
a 
r. [ yx '- a * _| 
f. x _ i 
f a- 
J x J 
x ]/x 2 - a 2 J 
c* 
1 1 
|K 
>> 
M 
= / x 2 - a 2 — a . arc sec — 
a 
6 . 
/• 
j/x 2 +a" 
d x = l/x^-j-a 2 + a L 
X 
y x 2 +a 2 -(-a 
7- f-^ldx= f dX |-^A_ 
x]/x— 1 J 1/x 2 — 1 Vx 2 — 1 
= L (x-f- V x 2 — 1 )-f- arc sec x. 
(Brahy, 20) 
55. Descompo&icion trigonometrica, o sea descomponer la 
derivada trigonometrica en dos o mas terminos. 
1. / versen x dx= / (1— cos x) d x 
