66 
MEMORIAS CIENTIFICAS I LITER ARIAS 
o f d X 2 _ 1 dx _ d Z ^ 
J x (a + b x 5 ) ea X z x 2 z 7 
luego 
* — Vr-/ 
adz 
2a j a z -i- b 
2a 
L (a z + b) 
= — L]/_ x . 2 
a r a + bx 2 
4. 
dx 
l/x 2 - 
Sea x= 
-a- 
dx 
x 
dy 
y 
d y 1 
. = -arc sen ax. 
l/l— *(a y) 2 a 
(Todhunter, II 7 13) 
' /■ 
dy 
x ]/ a 2 =t a 2 
Sea x = — 
■ y 
1 T x 
a a + /a a ±x 2 
.. r dx 0 1 
6. / ; _ - Sea x = — — 
J x l/2 a x — a 2 1 — z 
d x adz 
x 1 — z 
r adz Ipdz _ 1 
arc sen 
x — a 
x 
