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笔者近日拜读文献[1],受益匪浅,作者从一道圆中的定值问题出发,去探究椭圆、双曲线、抛物线的定值问题,进而探究一般的对称轴与坐标轴平行的二次曲线中的定值、定点问题,整个过程行云流水,一气呵成,读后深受启发,下面将我读后的点滴想法呈现出来,仅供读者参考.文[1]中的引例为:过圆(x-2)~2+(y-2)~2=2上一点P(3,3)作两条直线与该圆分别相交于两点E,F.若直线PE与PF的倾斜角互补,试
The author has recently read the literature [1], benefiting a lot, the author from a circle of valuation problem, to explore the elliptic, hyperbolic, parabolic set value problem, and then explore the general symmetry axis and coordinate axis parallel to the quadratic curve In the fixed value, the issue of fixed-point, the whole process of flowing water, at one go, inspired by reading, after reading the idea of a bit of me presented, for reference purposes only readers in [1] cited as: oval (x- 2) ~ 2 + (y-2) ~ 2 = 2 The previous point P (3,3) makes two straight lines and the circle respectively intersect at two points E, F. If the inclination of the straight line PE and PF is complementary,