What is the equation of a parabola in vertex form with focus (9, 5) and directrix y=3?
回答 (1)
2021-01-20 11:03 am
Recall that a parabola is a set of points which are equidistant from the focus and directrix.
Hence we can establish the relation:
y-3 = [(y-5)^2+(x-9)^2]^(0.5)
After rearranging terms, you can get the answer A.
Hence we can establish the relation:
y-3 = [(y-5)^2+(x-9)^2]^(0.5)
After rearranging terms, you can get the answer A.
收錄日期: 2021-04-24 08:09:28
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