Saturday
April 25, 2015

Homework Help: Discrete Math

Posted by yengiang on Saturday, April 16, 2011 at 8:58pm.

Let A={0,1,2,3,4}. Define a function f from A to A by f(n)=2n mod 5.

a/ Is f one-to-one?
b/ Is f onto?

Could you show me how to solve this problem, please? I have no idea what this function is.

Your help is greatly appreciated.

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