论文部分内容阅读
已知圆x2+y2=r2以及一点P(x0,y0),如果点P(x0,y0)在圆上则直线x0x+y0y=r2与圆相切,如果点P在圆外则直线x0x+y0y=r2与圆相交,如果点P在圆内则直线x0x+y0y=r2与圆相离.以上结论已经让人感觉到数学的和谐、协调与完美,只是尚未展示直线x0x+y0y=r2的确切含义.继续下去,还可发现更多精彩.
If the point P (x0, y0) is on the circle then the line x0x + y0y = r2 is tangent to the circle, and if the point P is outside the circle the line x0x + y0 = r2 and the point P (x0, y0) y0y = r2 intersects with the circle, if the point P is inside the circle, the line x0x + y0y = r2 is away from the circle. The above conclusion has made people feel the harmony, coordination and perfection of mathematics, but has not shown the straight line x0x + y0y = r2 Exact meaning. To continue, you can find more exciting.