Posted: 3/26/2011 7:37:06 PM EDT
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If: x^2 = 4ay then is is accurate to say that the value "a" is equal to the distance from the vertex to the focus? The book uses a lot of confusing gibberish and my professor didn't really say. Now I have to do homework where I have to determine the standard form equation of transformed parabolas based on the focus and the directrix. Knowing the answer to this would help a lot. |
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Quoted:
Quoted:
Avatar and question don't seem to match... Daniel Jackson was an archeologist and a linguist. Carter was the science and math geek. Anyone who ascends twice in the course of a couple of years can figure out a freaking parabola. Also, Wookies do not live on Endor, therefore your argument is invalid. |
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Quoted: If: x^2 = 4ay then is is accurate to say that the value "a" is equal to the distance from the vertex to the focus? The book uses a lot of confusing gibberish and my professor didn't really say. Now I have to do homework where I have to determine the standard form equation of transformed parabolas based on the focus and the directrix. Knowing the answer to this would help a lot. IIRC (and I am definitely rusty) the answer to your question is YES. And the value of 'a' will always be equal to the distance between the directix and the vertex. Given the focus and directix, the vertex will bisect the distance between the two along the axis of symetry. |
