Learning Mathematics for IIT JEE
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Saturday, December 6, 2008
Some other standard forms of parabola
y² = -4ax
x² = 4ay
In this case, the vertex is at the origin and the axis coincides with y-axis.
Focus is at F(0,a) and the equation of the directrix d: y = -a.
The parabola opens upward
x² = -4ay
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