Infact, through
graphs, we can even find maximum/minimum value of a function at a point at which it
is not even differentiable (Example 15) Rationalised 2023-24
APPLICATION OF DERIVATIVES
161
Fig 6 7
Example 14 Find the maximum and the minimum values, if
any, of the function f  given by
f (x) = x2, x ∈ R Solution From the graph of the given function (Fig 6