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A point moves so that its distance from (3, 0) equals its distance from x = -3. Find its locus.
Ay² = 6x
By² = 12x
Cy² = 3x
Dx² = 12y
Answer & Solution
Correct answer: B. y² = 12x
This is a parabola with focus (3, 0) and directrix x = -3, so a = 3 and the locus is y² = 12x.
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