anonymous
  • anonymous
What are the foci of the following graph?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
@Hero
anonymous
  • anonymous
What are the vertices?

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anonymous
  • anonymous
3 and -3?
anonymous
  • anonymous
that are co-vertex, how about main one?
anonymous
  • anonymous
5 and -5
anonymous
  • anonymous
i ment 6 and -6
anonymous
  • anonymous
ok, it is a vertical ellipse, hence the main one is a, and the co- one is b that is a = 6 and b =3 you have the formula to find foci c, which is \(c^2 = a^2 -b^2\), hence c =??
anonymous
  • anonymous
27?
anonymous
  • anonymous
that is c^2 , not c
anonymous
  • anonymous
13.5?
anonymous
  • anonymous
\(\sqrt{27} =??\)
anonymous
  • anonymous
5.19615
anonymous
  • anonymous
ok, it is \(3\sqrt3\) you can take your number.
anonymous
  • anonymous
One more thing, foci are on the same line with main vertices, right? your main one is \((0, \pm 6)\), hence your foci are \((0,\pm 3\sqrt3)\) Whenever jot down the foci or the vertex, you MUST write the pair of them to make it clear for the shape of the conic.
anonymous
  • anonymous
so what the anwser? im sorry..this confuesses me
anonymous
  • anonymous
@OOOPS
anonymous
  • anonymous
@Peaches15
anonymous
  • anonymous
|dw:1439513790413:dw|
anonymous
  • anonymous
|dw:1439513807160:dw|
anonymous
  • anonymous
neither of those are a choice
anonymous
  • anonymous
That is b , they are allllllllllllllll same.
anonymous
  • anonymous
ohh okay!
anonymous
  • anonymous
|dw:1439513905893:dw|

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