12. A function f :R → R is said to be additive if f(x + y) = f(-x)+f(y) for all x, y in R. Prove that if f is continuous
Posted: Mon May 09, 2022 11:02 am
12. A function f :R → R is said to be additive if f(x + y) = f(-x)+f(y) for all x, y in R. Prove that if f is continuous at some point xo, then it is continuous at every point of R. (See Exercise 4.2.12.)