Search any question & find its solution
Question:
Answered & Verified by Expert
If the sum of the slopes of the lines given by $x^2-2 c x y-7 y^2=0$ is four times their product, then $c$ has the value
Options:
Solution:
1389 Upvotes
Verified Answer
The correct answer is:
2
2
$m_1+m_2=-\frac{2 c}{7}$ and $m_1 m_2=-\frac{1}{7}$
$m_1+m_2=4 m_1 m_2 \quad$ (given)
$\Rightarrow c=2$
$m_1+m_2=4 m_1 m_2 \quad$ (given)
$\Rightarrow c=2$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.