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If the line x + y -1=0 is a tangent to a...

If the line `x + y -1=0` is a tangent to a parabola with focus `(1,2)` at A and intersect the directrix at B and tangebt at vertex at C respectively, then `AC.BC` is equal to

A

2

B

1

C

`1/2`

D

none of these

Text Solution

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The correct Answer is:
C
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