Straight Line Question 38
Question: If the lines $ ax+by+c=0 $ , $ bx+cy+a=0 $ and $ cx+ay+b=0 $ be concurrent, then [IIT 1985; DCE 2000, 02]
Options:
A) $ a^{3}+b^{3}+c^{3}+3abc=0 $
B) $ a^{3}+b^{3}+c^{3}-abc=0 $
C) $ a^{3}+b^{3}+c^{3}-3abc=0 $
D)None of these
Correct Answer: C
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Answer:
Solution:
Þ $ a^{3}+b^{3}+c^{3}-3abc=0 $ .
BETA
