� Some properties of indefinite integrals are as follows:
1 [ ( )
( )]
( )
( )
f x
g x
dx
f x dx
g x dx
+
=
+
∫
∫
∫
2 For any real number k, 
( )
( )
k f x dx
k
f x dx
=
∫
∫
More generally, if f1, f2, f3, , fn are functions and k1, k2,