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Question: Answered & Verified by Expert
If one of the lines given by $6 x^2-x y+4 c y^2=0$ is $3 x+4 y=0$, then $c$ equals
MathematicsStraight LinesJEE MainJEE Main 2004
Options:
  • A
    1
  • B
    $-1$
  • C
    3
  • D
    $-3$
Solution:
1550 Upvotes Verified Answer
The correct answer is:
$-3$
$m_1+m_2=\frac{1}{4 c}, m_1 m_2=\frac{6}{4 c}$ and $m_1=-\frac{3}{4}$ Hence c $=-3$

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