Mathematics

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What are the coordinates of the focus and the equation of the directrix?

A. focus:; [-1/4, 0]; directrix: x = 1/4

B. focus:; [1/4, 0]; directrix: x = - 1/4

C. focus: (-4,0); directrix: x = 4

D. focus: (4,0); directrix: x = - 4

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