Pair Of Straight Lines Question 93
Question: Condition that the two lines represented by the equation $ ax^{2}+2hxy+by^{2}=0 $ to be perpendicular is
[Kurukshetra CEE 1998; MP PET 2001]
Options:
A) $ ab=-1 $
B) $ a=-b $
C) $ a=b $
D) $ ab=1 $
Show Answer
Answer:
Correct Answer: B
Solution:
Coefficient of $ x^{2}+ $ coefficient of $ y^{2}=0 $
$ \Rightarrow a+b=0\Rightarrow a=-b $ .
BETA
