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  • 19-06-2017
  • Mathematics
contestada

which equation describes a parabola that opens up or down and whose vertex is at the point (h,v)

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Аноним Аноним
  • 19-06-2017

y  = a ( x - h)^2 + v             


a is positive when the parabola opens up  and negative when it opens down.
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