SOLUTION: what is the vertex, focus, and directrix of y=1/3x^2-2x+6

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Question 443938: what is the vertex, focus, and directrix of y=1/3x^2-2x+6
Answer by poliphob3.14(115)   (Show Source): You can put this solution on YOUR website!
First we need to find the standard form of the parabola equation:
=> => .
The final equation is the equation of parabola with vertex (3, 3).
Since 4c=3 we get c=3/4, and the focus is (3, 3+3/4) or (3, 15/4).
The directrix is y=3-3/4=9/4.

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