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The line x+ y +2=0 is a tangent to a pa...

The line `x+ y +2=0` is a tangent to a parabola at point A, intersect the directrix at B and tangent at vertex at C respectively. The focus of parabola is `S(2, 0)`. Then

A

CS is perpendicular to AB

B

`AC,BC=CS^(2)`

C

AC, BC = 8

D

AC = BC

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A, B, C, D
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