If f(x) is to be periodic then the L.C.M must exist.
How do you know that the period of the sum must be a period of both?
Assuming this, of course, the problem is easy; but you should supply proofs of your statements!
How do you know that the period of the sum must be a period of both?
Assuming this, of course, the problem is easy; but you should supply proofs of your statements!