If 
and
, find f(x).
Given 
and
On integrating the given equation, we have
We know 
Recall 
On substituting x = 1 in f(x), we get
On substituting the value of c in f(x), we get
Thus, 
45
If and, find f(x).
Given and
On integrating the given equation, we have
We know
Recall
On substituting x = 1 in f(x), we get
On substituting the value of c in f(x), we get
Thus,