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笔者最近在帮学生解答一道有关直线倾斜角的选择题时,发现从两种视角来解答,“小做”和“大做”有天壤之别!原题(肇庆2010期末检测)若圆x2+y2-4x-4y-10=0上至少有三个不同的点到直线l:
The author recently to help students answer a multiple choice of questions about the linear tilt angle, found that from two perspectives to answer, “little do ” and “big do ” a world of difference! Original title (Zhaoqing 2010 end of the test) If the circle x2 + y2-4x-4y-10 = 0 at least three different points to the line l: