130 
MEMORIAL CIENTIT ICAS 1 LITER ARIAS 
YJ. Sea n negativo: 
/ 
e ax 
(n — 1) x n i 
a r e ax 
n— 1 J x 11 — i 
d x 
VIII. Sea x== — 1; 
r G ax , T , , cl X“ , cl X 
J— dx=L x + ax +^w + 
a x 2 , a° x 
IX. Sea n = 3, a=l 
f^c lx-- 
3. , x m L n x d x . 
e x 
/ii \ i 1 f ex dx 
r(l+x)+ Y j—~ 
(Gregory, 276-277) 
(Gregory, 277) 
Sea 
u = L n x 
. d u = n L n — 1 
ax 
d v = x m d x 
v = - 
X m El 
m-j-l 
x m + l L”x 11 r _ - 
Y = — — — — r-" / L n ~ 1 x d x 
J m+1 m+1 J 
L Sea, n=l, 
r T , x m +!.Lx 1 
/ x lu L x d x = — - 
J m+1 
Xin + l 
m+1 m+1 1 
