now what can you say?
Suppose is the function zero. So that for all except for finitely many points . show that .(b) suppose f is an integrable function on [a,b] and suppose that g is a function such that f(x)=g(x) except for finitely many . Show that g is integrable on [a,b] and
Once you do the above, apply the argument to the difference , to get (use part (a))