Find the focus of the parabola defined by the equation x^2 = 12y.

Practice Questions

Q1
Find the focus of the parabola defined by the equation x^2 = 12y.
  1. (0, 3)
  2. (0, -3)
  3. (3, 0)
  4. (-3, 0)

Questions & Step-by-Step Solutions

Find the focus of the parabola defined by the equation x^2 = 12y.
  • Step 1: Start with the given equation of the parabola: x^2 = 12y.
  • Step 2: Recognize that this is a standard form of a parabola that opens upwards, which can be written as y = (1/4p)x^2.
  • Step 3: Compare the given equation x^2 = 12y with the standard form y = (1/4p)x^2. Here, 12y = (1/4p)x^2.
  • Step 4: To find p, rewrite the equation as y = (1/12)x^2. This means 1/4p = 1/12.
  • Step 5: Solve for p by cross-multiplying: 4p = 12, so p = 3.
  • Step 6: The focus of a parabola that opens upwards is located at (0, p). Since p = 3, the focus is at (0, 3).
  • Parabola Properties – Understanding the standard form of a parabola and how to identify its focus.
  • Vertex Form Conversion – Rewriting the equation of a parabola in vertex form to find the focus.
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