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JEE Main & Advanced Mathematics Conic Sections Question Bank Parabola

  • question_answer
    If the line \[y=2x+k\] is a tangent to the curve \[{{x}^{2}}=4y\], then k is equal to                                             [AMU 2002]

    A)            4     

    B)            1/2

    C)            ?4   

    D)            ?1/2

    Correct Answer: C

    Solution :

               Given\[m=2\], \[c=k\], \[a=1\]                    Hence, \[k=-4\].


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