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If the lines x+2ay+a=0, x+3by+b=0 and x+...

If the lines `x+2ay+a=0, x+3by+b=0` and `x+4cy+c=0` are concurrent then `a,b,c` are in

A

A.P.

B

G.P.

C

H.P.

D

none of these

Text Solution

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The correct Answer is:
C
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MCGROW HILL PUBLICATION-CARTESIAN SYSTEM OF RECTANGULAR COORDINATES AND STRAIGHT LINES -SOLVED EXAMPLES (LEVEL 1) SINGLE CORRECT ANSWER TYPE QUESTIONS
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