#Generalizeyall {U8 IFan question 2 [That is suppose that k and l are positive integers, U = {f :R-R:f (x) = f (x+k)} and V ={f:R-R:f (x) = f (x+l)} In other words, these are the subspaces of functions period k and l respectively: Is there a period such that U+V={f:R-R:f(x)= f (x+ P)}? Is there a smallest such period? Prove or give counterexample_