Therefore, the given function has neither the
maximum value nor the minimum value in the interval (0,1) Remark The reader may observe that in Example 16, if we include the points 0 and 1
in the domain of  f , i e , if we extend the domain of  f  to [0,1], then the function  f  has
minimum value 0 at x = 0 and maximum value 1 at x = 1