If the straight lines \[ax+may+1=0,\] \[bx+(m+1)by+1=0\] and \[cx+(m+2)cy+1=0\] are concurrent, then a, b, c form \[(m\ne 0)\]

If the straight lines \[ax+may+1=0,\] \[bx+(m+1)by+1=0\] and \[cx+(m+2

1.	If the straight lines \[ax+may+1=0,\] \[bx+(m+1)by+1=0\] and \[cx+(m+2)cy+1=0\] are concurrent, then a, b, c form \[(m\ne 0)\]
A.	An A.P. only for m=1
B.	An A.P. for all m
C.	A G.P. for all m
D.	A H.P. for all m
Answer» E.

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If the straight lines \[ax+may+1=0,\] \[bx+(m+1)by+1=0\] and \[cx+(m+2)cy+1=0\] are concurrent, then a, b, c form \[(m\ne 0)\]

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