Recent content by zaczhou

  1. Z

    Are g(x) and f(g(x)) both onto?

    if f(y) is one to one, and f(g(x)) is one to one, is g(x) one to one? if g(x) is one to one, and f(g(x)) is one to one, is f(y) one to one? if g(x) and f(g(x)) are onto, is f(y) is also onto? if f(y) and f(g(x)) are onto, is g(x) is also onto?