If the points \( A(1,3) \) and \( B(5,5) \) lying on a parabola
\( ...
If the points \( A(1,3) \) and \( B(5,5) \) lying on a parabola
\( \mathrm{P} \) are equidistant from its focus, then the slope of the
W directrix is:
(1) \( \frac{1}{2} \)
(2) \( -\frac{1}{2} \)
(3) 2
(4) -2
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