ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 10 Apr 2019 23:12:49 +0200The function f: ℝ → ℝ defined by f(x) = 7x is onto because for any real number r, we have that r/7 is a real number and f(r/7) = r. Consider the same function defined on the integers g: ℤ → ℤ by g(n) = 7n.https://ask.sagemath.org/question/46081/the-function-f-r-r-defined-by-fx-7x-is-onto-because-for-any-real-number-r-we-have-that-r7-is-a-real-number-and-fr7-r-consider-the-same-function/ Explain why g is not onto ℤ and give one integer that g cannot outputWed, 10 Apr 2019 23:12:49 +0200https://ask.sagemath.org/question/46081/the-function-f-r-r-defined-by-fx-7x-is-onto-because-for-any-real-number-r-we-have-that-r7-is-a-real-number-and-fr7-r-consider-the-same-function/