论文部分内容阅读
阅读了《中小学数学》(初中版)2015第4期孟德俊的《一道三角形征解题的再证明》一文,对文中的证法有疑惑:其一,文中图1、图2画法的基础为a>0,事实上要讨论:不论a为何值,原题都成立;其二,在平面直角坐标系中证明,对不同图像的性质认识,不尽相同.也就是说,函数图像的性质随图像的变化而变化,有些不变性很难说清楚.原题如下.
Read the “primary and secondary mathematics” (junior high school edition) 2015 the fourth Mengde Jun “a triangular evidence solving problem” one article, the text of the law there is doubt: First, the text in Figure 1, Figure 2 For a> 0, in fact to be discussed: no matter what a value, the original title is established; Second, in the rectangular Cartesian coordinate system to prove that the nature of different images are not the same, that is, the nature of the function image As the image changes, some of the invariance is hard to say.