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Which of the following functions f:ZZ is not one-to-one? f(a)=a+2 f(a)=2a+1 f(a)=a2+1 None of them
Which of the following functions f:ZZ is not one-to-one? f(a)=a+2 f(a)=2a+1 f(a)=a2+1 None of them
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