If the point \( P(4,-2) \) is the one end of the focal \( \mathrm{P...

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If the point \( P(4,-2) \) is the one end of the focal
\( \mathrm{P} \) chord \( P Q \) of the parabola \( y^{2}=x \), then the slope of

W the tangent at \( Q \) is
(1) \( -\frac{1}{4} \)
(2) \( \frac{1}{4} \)
(3) 4
(4) -4
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