Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Coordinate Geometry
0 votes

The pair of lines represented by $3ax^2+5xy+(a^2-2)y^2=0$ are perpendicular to each other for

$\begin{array}{1 1}(A)\;\text{two value of a}\\(B)\;\forall a\\(C)\;\text{for one value of a}\\(D)\;\text{for no values of a} \end{array}$

Can you answer this question?

1 Answer

0 votes
=> $a=\large \frac{-3 \pm \sqrt {9+8}}{2}$
$\qquad = \large\frac{-3\pm \sqrt {17}}{2}$
Hence we have two values of a
Hence A is the correct answer.
answered Apr 8, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App