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JEE Main & Advanced Mathematics Functions Question Bank Numerical Value Type Questions - Relations and Functions-II

  • question_answer
    Let \[f\left( x \right)={{\left( x+1 \right)}^{2}}-1,\] \[\left( x\ge -1 \right)\]. Then the number of elements in the set \[S=\{x:f(x)={{f}^{-1}}(x)\}\] is

    Answer:

    4


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