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OpenStudy (vera_ewing):
Derive the equation of the parabola with a focus at (4, –7) and a directrix of y = –15. Put the equation in standard form.
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OpenStudy (vera_ewing):
f(x) = ((1/16)x^2) – (1/2x) + 11 am i right? @ganeshie8
ganeshie8 (ganeshie8):
Looks perfect!
OpenStudy (vera_ewing):
yay! thank you! :)
ganeshie8 (ganeshie8):
hey waIt wait
OpenStudy (vera_ewing):
yeah that was the last question and i got it wrong :(
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ganeshie8 (ganeshie8):
the constat term doesn't look right
OpenStudy (vera_ewing):
what should it be
ganeshie8 (ganeshie8):
f(x) = ((1/16)x^2) - (1/2x) - 10
ganeshie8 (ganeshie8):
try that
ganeshie8 (ganeshie8):
use wolfram to double check ur answer http://www.wolframalpha.com/input/?i=focus+f%28x%29+%3D+%28%281%2F16%29x%5E2%29+%E2%80%93++%281%2F2x%29+-10
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