Learning mathematics is not about reading any books, but about whether you can sum up the problems, think about why the problems are solved like this, and how to think of such steps.
For example, there are three points on a circular orbit curve. What are the three-point lines? Ask if there is a circle?
What comes to mind first,
(1) You should consider the nature of the three-point * * * line! !
1. Is there a real number? 0? 5、make AB=？ 0? 5 BC
The slopes of two or three points are equal, k 1=k2.
Or the coordinate x 1y2=x2y 1.
Three, two points form a straight line, and the coordinates of the other point are substituted.
(2)
First find the center of the circle (usually a special point) and transfer it to three points at the same distance.
Two or three points form a right triangle, and the opposite side of the right angle is the diameter.
At the same time, regarding conic curves, regardless of 372 1, that is, the union cubic equation and Vieta theorem. (Note that parabola is usually solved by eliminating X and getting a quadratic equation of Y)
This is my own summary.
Generally speaking, learning mathematics is not about reading books, but about whether you can sum up yourself, reflect on yourself and think for yourself. In that case, it is possible to score liberal arts 120.