Straight Line Question 56
Question: The three straight lines $ ax+by=c,bx+cy=a $ and $ cx+ay=b $ are collinear, if [MP PET 2004]
Options:
A) $ a+b+c=0 $
B) $ b+c=a $
C) $ c+a=b $
D) $ a+b=c $
Correct Answer: A $ \Rightarrow $ $ -(a+b+c)| \begin{matrix} 1 & b & c \\ 1 & c & a \\ 1 & a & b \\ \end{matrix} |=0 $ Clearly, $ (a+b+c)=0 $
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Answer:
Solution:
BETA
