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It is very difficult to analyze the big and small geometric questions in college entrance examination mathematics. How to prepare and deal with these problems? What is the general idea?
Only simple and easy questions, close to the definition, familiar with formulas (including triangles) and mastering extended formulas such as focal radius can solve problems.
The main problems are difference method and Vieta theorem method. After you calculate X 1+X2 and X 1x2, add them to the chord length formula or other known conclusions, and you will get more than half of the points.