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Line Ax+ By +C+ 0 cuts circle x^(2) +y^(...

Line `Ax+ By +C+ 0` cuts circle `x^(2) +y^(2) + ax+ by+c= 0` in P and Q and the line `A' x+ B'y +C'= 0` cuts the circle `x^(2) +y^(2) +a'x +b'y+c'= 0` in R and S. If the four points P, Q, R and S are con-cyclic, then `D= |(a-a',b-b',c-c'),(A,B,C),(A',B',C')|`

A

1

B

0

C

`-1`

D

None of these

Text Solution

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The correct Answer is:
B
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