� From the geometric point of view, an indefinite integral is collection of family
of curves, each of which is obtained by translating one of the curves parallel
to itself upwards or downwards along the y-axis � 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,