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Parabola Opening Towards Negative $$y$$-Axis
$$x^2=-4ay$$
Terminology
- Vertex → $$(0,0)$$.
- Focus → $$(0,-a)$$.
- Directrix → $$y=a$$.
Usage
- Used for a parabola opening downwards.
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Parabola Opening Towards Negative $$y$$-Axis
$$x^2=-4ay$$
Terminology
- Vertex → $$(0,0)$$.
- Focus → $$(0,-a)$$.
- Directrix → $$y=a$$.
Usage
- Used for a parabola opening downwards.
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