JEE Main & Advanced JEE Main Paper (Held on 09-4-2019 Morning)

  • question_answer If the function \[f:R-\{1,-1\}\to A\]defined by \[f(x)=\frac{{{x}^{2}}}{1-{{x}^{2}}},\]is subjective, then A is equal to [JEE Main 9-4-2019 Morning]

    A) \[R-[-1,0)\]      

    B) \[R-(-1,0)\]

    C) \[R-\{-1\}\]                  

    D) \[[0,\infty )\]

    Correct Answer: A

    Solution :

    \[y=\frac{{{x}^{2}}}{1-{{x}^{2}}}\] Range of y : R -[-1,0) for surjective funciton, A must be same as above range.         

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