Gaokao Math Practice Question
4. 已知 $A$ 为抛物线 $C: y^{2}=2 p x(p>0)$ 上一点, 点 $A$ 到 $C$ 的焦点的距离为 12 , 到 $y$ 轴的距离为 9 , 则 $p=()$
- A.2
- B.3
- C.6
- D.9
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