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vertex (-2, 3), focus (0,3)
Find the equation of the parabola.
Dirac.
Find the equation of the parabola.
Dirac.
What have you tried so far?Dirac said:vertex (-2, 3), focus (0,3)
Find the equation of the parabola.
Dirac.
So far I have got to thislurflurf said:What have you tried so far?
Find the directix. then recall
A parabola is the set of point equidistant from the focus and directix.
a will be the distance between the focus and vertex.Dirac said:So far I have got to this
((y-3)^2)=4a(x+2)
What now
Dirac.
How does one find the vertexlurflurf said:a will be the distance between the focus and vertex.
Why is this?
you started out withDirac said:How does one find the vertex
Could you just post the answer, or would it get up your backside to post something useful in your lifelurflurf said:you started out with
vertex (-2, 3), focus (0,3)
The points of a parabola are equidistant from it directrix and focus.
The vertex is the point closest to them. that is
distance(vertex,focus)<=distance(point on parabola,focus)
with equality only when the point is the vertex.
I already said you a is the distance betweenDirac said:Could you just post the answer, or would it get up your backside to post something useful in your life
Dirac.
How pathetic. Why in the world would anyone care what the answer to some made up question like this is? The whole point of an exercise like this is to learn how to get the answer. I'll bet there's a "general formula" for the parabola in the same section of your text as this problem. Look it up. We're here for people who want to learn not for people who want the answers handed to them.Dirac said:Could you just post the answer, or would it get up your backside to post something useful in your life
Dirac.