Gaokao Math Practice Question
5. (5 分) 设 $F$ 为抛物线 $C: y^{2}=4 x$ 的焦点, 曲线 $y=\frac{k}{x}(k>0)$ 与 $C$ 交于点 $P, P F$ $\perp x$ 轴, 则 $k=(\quad)$
- A.$\frac{1}{2}$
- B.1
- C.$\frac{3}{2}$
- D.2
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