If the lines \[ax+by+c=0\], \[bx+cy+a=0\] and \[cx+ay+b=0\] be concurrent, then [IIT 1985; DCE 2000, 02]

\[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}+3abc=0\]

\[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}-abc=0\]

\[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}-3abc=0\]

If the lines \[ax+by+c=0\], \[bx+cy+a=0\] and \[cx+ay+b=0\] be concu

1.	If the lines \[ax+by+c=0\], \[bx+cy+a=0\] and \[cx+ay+b=0\] be concurrent, then [IIT 1985; DCE 2000, 02]
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
Answer» D. None of these

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If the lines \[ax+by+c=0\], \[bx+cy+a=0\] and \[cx+ay+b=0\] be concurrent, then [IIT 1985; DCE 2000, 02]

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