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荆州市 1 999届高中毕业班质量检查 (Ⅲ )的理科压轴题是这样的一道解析几何题 :已知抛物线方程为ｘ2 =- 2 (ｙ -ｈ) ,ｐ(2 ,4)在抛物线上 ,Ｍ ,Ｎ在ｘ轴上 ,ＰＭ交抛物线于Ａ ,ＮＰ的延长线交抛物线于Ｂ ,△ＰＭＮ中 ,｜ＰＭ｜ =｜ＰＮ｜ ,设Ｍ的坐标为 (ａ ,0 ) ,(1 )求抛物
The science finale of the 1,999th high school graduating class in Jingzhou City (III) is an analytic geometry problem: the parabolic equation is known as x2 =- 2 (y-h), and p(2,4) is on the parabola. M and N are on the x-axis, PM is parabolic to A, and NP is extended to parabola to B and △PMN, |PM| =|PN|. Let M be (a, 0), (1) Parabolic