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JEE Main & Advanced Mathematics Straight Line Question Bank Angle between two straight lines, Bisector of angle between two lines

  • question_answer
    If the line passing through (4, 3) and (2, k) is perpendicular to \[y=2x+3\], then k =                    [RPET 1985; MP PET 1999]

    A) -1       

    B) 1

    C) 4        

    D) 4

    Correct Answer: D

    Solution :

               \[\left( \frac{k-3}{2-4} \right)\text{ }(2)=-1\Rightarrow 2k-6=2\Rightarrow k=4\].


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