When the formula to be used is correct, there will be corresponding scores. Generally speaking, there are two quizzes on conic section. If it is a question with a perfect score of 15, the first test pair will get five to seven points, and the second test pair will get ten to eight points. Each key formula used will be given one point to two points, and the correct answer will be given one point to two points, which proves that it is smooth and reasonable, and no mistakes will be given full marks.

Conic curve has always been a difficult point in college entrance examination. It is suggested to memorize the equations of ellipse, parabola and hyperbola, do more corresponding exercises and carefully check the problem-solving steps of research standards. Even if you can't, you should have a general idea of what to write at each step. Don't leave a topic, at least write out the formula first.

Extended data:

More than 2000 years ago, ancient Greek mathematicians first began to study conic curves, and achieved a lot of results. Apollonius, an ancient Greek mathematician, studied these curves with the method of plane truncated cone.

Cut the cone with a plane perpendicular to the axis of the cone and you get a circle; Tilt the plane gradually to get an ellipse; When the plane is inclined to "and only parallel to a generatrix of the cone", a parabola is obtained; A branch of a hyperbola can be cut with a plane parallel to the axis of a cone.

Linear parametric equation: x=x+tcosθ y=y+tsinθ (t is the parameter).

Cyclic parameter equation: x=X+rcosθ y=Y+rsinθ (θ is the parameter).

Elliptic parameter equation: x=X+acosθ y=Y+bsinθ (θ is the parameter).

Hyperbolic parametric equation: x=X+asecθ y=Y+btanθ (θ is the parameter).

Parabolic parameter equation: x = x = x=2pt^2 y=2pt (t t t is the parameter).

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