, kn giving
[
]
1 1
2 2
( )
( )
( )
n
n
k f x
k f
x k f
x
dx
+
+
+
∫
= 
1
1
2
2
( )
( )
( )
n
n
k
f x dx
k
f
x dx k
f
x dx
+
+
+
∫
∫
∫ To find an anti derivative of a given function, we search intuitively for a function
whose derivative is the given function