cleanfrommysins cleanfrommysins
  • 22-06-2020
  • Mathematics
contestada

Find the focus of the parabola 2x^2=-y

Respuesta :

altavistard
altavistard altavistard
  • 27-06-2020

Answer:

(0, -1/2)

Step-by-step explanation:

Rewrite this as y = -2x^2.  Because of the negative sign, as well as the fact that y is the dependent variable, we know that the graph of this parabola opens downward.

Comparing y = -2x^2 with

                   y = 4px^2, we see that 4p = -2, or p = -1/2.

The focus of this parabola is below the x-axis:  (0, -1/2).

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