JEE Main & Advanced Mathematics Functions Question Bank Self Evaluation Test - Relation and Functions-II

  • question_answer
    \[f:R\to \]defined by \[f(x)=(x-1)(x-2)(x-3)\] is

    A) one-one and into

    B) one-one and onto

    C) Many one and into

    D) many-one and onto

    Correct Answer: D

    Solution :

    [d] Graphically, \[y=f(x)=(x-1)(x-2)(x-3),\] which is clearly many -one and onto.


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