8), we
have  f (x) = 0 if x = 0 Also
f (x) ≥ 0, for all x ∈ R Therefore, the minimum value of  f  is 0 and the point of
minimum value of f is x = 0 Further, it may be observed
from the graph of the function that f  has no maximum value
and hence no point of maximum value of  f  in R