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Directrix of a Vertically Shifted Parabola
For:
$$(x-h)^2=4a(y-k)$$
the directrix is:
$$y=k-a$$
Usage
- Used in focus-directrix and distance-based problems.
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Directrix of a Vertically Shifted Parabola
For:
$$(x-h)^2=4a(y-k)$$
the directrix is:
$$y=k-a$$
Usage
- Used in focus-directrix and distance-based problems.
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