The graph of the equation x²=4cy is a parabola with focus F(_,_) and directrix y=____ . So the graph x²=12y is a parabola with focus F(_,_) and directrix y=___.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter7: Conic Sections
Section7.1: Parabolas
Problem 2E: The graph of the equation x2=4py is a parabola with focus F(__, __) and directrix y = ____. So the...
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The graph of the equation x²=4cy is a parabola with focus F(_,_) and directrix y=____ . So the graph x²=12y is a parabola with focus F(_,_) and directrix y=___.
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