Question: In each case, answer whether the function f:ZZ is onto and whether it is one-to-one and explain your answer. (a) f(k)=k2+k+1 (b) f(k)=3k+1 (c) f(k)=3k+1mod5

In each case, answer whether the function f:ZZ is onto and

In each case, answer whether the function f:ZZ is onto and whether it is one-to-one and explain your answer. (a) f(k)=k2+k+1 (b) f(k)=3k+1 (c) f(k)=3k+1mod5

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