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What is the "three types, five methods, four points and one axis" in the parabola of junior high school mathematics?
Three types: top type, cross type and ordinary type;

Five methods: definition method, special position method, clever equation method, divisible method and vector method;

Four points: two intersections with X axis, and intersections with Y axis and vertex;

Axis: axis of symmetry.

Don't be superstitious about these things. As long as you master knowledge flexibly in doing problems, you can learn mathematics well.

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