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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 34

  • question_answer
    Let \[f\left( x \right)=x\left[ x \right],x\in z,\left[ . \right]\] is GIF then \[f'\left( x \right)=\]

    A) \[2x\]                

    B)        \[[x]\]    

    C) \[2[x]\]              

    D)        None

    Correct Answer: B

    Solution :

    [b] For \[x\notin z,\left[ x \right]\] is diff. and is same constant so \[f'\left( x \right)=\left[ x \right]\]


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