If f (x) = x2, find the value of 
.
Given: f(x) = x2
To find: 
…(i)
Firstly, we find the f(5)
Putting the value of x = 5 in the given eq., we get
f(5) = (5)2
⇒ f(5) = 25
Similarly,
f(1) = (1)2
⇒ f(1) = 1
Putting the value of f(5) and f(1) in eq. (i), we get
Hence, the value of 
1