This needs to be refined: f(x) is O(g(x)) if there exists some X >= 0 such that f(x)/g(x) is bounded for all x > X. Otherwise, we cannot say that 1 is O(x), fo

This needs to be refined: f(x) is O(g(x)) if there exists some X >= 0 such that f(x)/g(x) is bounded for all x > X. Otherwise, we cannot say that 1 is O(x), for example.