Case 2 If c ∈ D2, then lim
( )
lim
x
c
x
c
f x
→
=→
 (– x + 2)
= – c + 2 = f (c) and hence f is continuous in D2 Since f is continuous at all points in the domain of f,
we deduce that f is continuous Graph of this
function is given in the Fig 5 6