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30 May, 09:35

Find the vertex, focus, directrix, and focal width of the parabola.

x2 = 20y

+5
Answers (1)
  1. 30 May, 12:28
    0
    The parabola:

    x² = 20 y

    It is in the standard form : x² = 4 b y

    b = 20 : 4 = 5

    Vertex : (0, 0);

    Focus : (0, 5);

    Directrix : y + 5 = 0; y = - 5

    Focal width: 4 * 5 = 20 units

    Answer: A)
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