f(x) =

















3


  ____
x2+1
 

  


g
 
+
X

W 
f(x) dx
 
;
x Y
b

a 
a

b 





z
D
:
···
:
x
l





;
x
1
3+ 2
2+ 1
3
;
xQ


File translated from TEX by TTH, version 2.01.
On 1 Jan 1980, 02:11.