Mathematics

Mathematics

Problem

4. Show that the Modulus Function f:R→Rf: \mathbf{R} \rightarrow \mathbf{R}, given by f(x)=∣x∣f(x)=|x|, is neither oneone nor onto, where ∣x∣|x| is xx, if xx is positive or 0 and ∣x∣|x| is −x-x, if xx is negative.

Browse the problem library