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If the lines ax+y+1=0, x+by+1=0 and x+y+...

If the lines ax+y+1=0, x+by+1=0 and x+y+c=0 (a,b and c being distinct and different from 1) are concurrent the value of `(a)/(a-1)+(b)/(b-1)+(c)/(c-1)` is

A

`-1`

B

0

C

1

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 -EXERCISE (LEVEL 1) SINGLE CORRECT ANSWER TYPE QUESTIONS
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