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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

`-2`

B

`-1`

C

1

D

2

Text Solution

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The correct Answer is:
C
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