一、情境再现教师要求学生随便写下两个正整数作为数列的前两项,从第三项起,每一项都等于前两项的和,学生在TI图形计算器的列表与电子表格页面中,先写下数列的前两项,第三项定义为前两项的和后,再用“填充”功能构造数列的前20项(如图1),并把数列的第20项发送给教师,教师利用第20项的数据就猜出学生开始时写下的两个数(如图2). Situation Reproduction The teacher asks the student to write down the two positive integers as the first two of the series, starting from the third, each equal to the sum of the first two terms, and the student’s list of TI graphing calculators and the spreadsheet page , First write the first two of the series, the third is defined as the sum of the first two, and then use the “fill” function to construct the first 20 of the series (Figure 1), and the 20th of the series Sent to the teacher, teachers use the first 20 data to guess the number of students wrote the beginning of the two (Figure 2).