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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 `1/(a-1)+1/(b-1)+1/(c-1)` is

A

0

B

1

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
C
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