圆锥曲线存在性问题的探索

A Probe into existing Problem of Conic Section

圆锥曲线对于曲线的存在性问题是探索问题的基本类型之一 ,它是在题设条件下探索某个数学对象 (点、线、数等 )是否存在或某个结论是否成立。解决这类问题没有现成的套路和法则。

Conic section for the curve's existing problem is one of basic probing problems,which is used to probe whether centain mathematics target(point,line,number etc.)exists or whether certain conclusion is correct under the hypothesis.There are no ready-made methods or laws to this kind of problem.The article analyses the judgement method to the existing problem of conic sections.