Define if and on .
Prove that the function is integrable.
Now, I know that a theorem says that a function that is continuous over a bounded interval is integrable. And I also know that another theorem says that a function that has finitely many discontinuities over a bounded interval is also integrable. So since both x and 2 are continuous, this function is integrable.
Is this right? Should I have a more formal proof? And is it possible to show this is integrable by using the definition or ?