很多大型的会议、活动和组织机构都有自己的标志会徽.我在代数精编上发现一道题,题意是这样的:1992年在加拿大魁北克召开的国际数学教育大会的会徽,会徽的主体图案是由八个直角三角形构成,这八个直角三角形的共同点是它们都有一条相等的直角边(见图1).如图2,如果我们设OA1=A1A2=A2A3=A3A4=A4A5=A6A7=A7A8=1的话,仔细一观察便发现,每个直角三角形的斜边共同组成了一条规律即 OA1:OA2:OA3:…… =1:2～(1/2):3～(1/3):…… Many large-scale conferences, events and organizations have their own logo emblems. I found a problem in algebraic fine editing. The meaning of the subject is this: the emblem of the International Mathematics Education Conference held in Quebec, Canada in 1992, the main symbol of the emblem. It consists of eight right-angled triangles. The common point of these eight right-angled triangles is that they all have an equal right-angled edge (see Figure 1). As shown in Figure 2, if we set OA1=A1A2=A2A3=A3A4=A4A5=A6A7= A7A8 = 1, then carefully observed that the oblique sides of each right-angled triangle together constitute a rule that OA1: OA2: OA3: ... =1:2 ~ (1/2): 3 ~ (1/3) :......