JEE Main & Advanced Mathematics Straight Line Question Bank Slope of line, Equation of line in different forms

  • question_answer
    The line \[lx+my+n=0\] will be parallel to x-axis, if

    A)            \[l=m=0\]                                

    B)            \[m=n=0\]

    C)            \[l=n=0\]                                 

    D)            \[l=0\]

    Correct Answer: D

    Solution :

               Parallel to x-axis \[\Rightarrow y=A\], so l must be zero.


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