Example: 1) Let f: R(the set of real numbers)C(the set of complex number), fa=ial; 令2)Letg:R( the set of real numbers→C(the set of complex number), ga=ia; 今3)Leth:Z一Zm={0,1,…m-1},h(a)= a mod n . s onto. one to one❖ Example:1) Let f: R(the set of real numbers)→C(the set of complex number), f(a)=i|a|; ❖ 2)Let g: R(the set of real numbers)→C(the set of complex number), g(a)=ia; ❖ 3)Let h:Z→Zm={0,1,…m-1}, h(a)=a mod m ❖ onto ,one to one?