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课题的提出想一想，程序Ⅰ揭示了怎样的数学关系？Ｓ１：（ａ）２＝ａ（ａ≥０）．（公式１）Ｔ：对不对呢？我们来验证一下．分别向公式１中输入数据ａ＝０；ａ＝２；ａ＝１３，输出的结果依次是（０）２＝０；（２）２＝２；（１３）２＝１３．结论与公式１相符，说明Ｓ１同
The question is raised. How does program I reveal the mathematical relationship? S1:(a)2=a(a≥0). (Formula 1) T: Right? Let’s verify it. The data a = 0; a = 2; a = 13 are respectively input to formula 1, and the output results are (0) 2 = 0; (2) 2 = 2; (13) 2 = 13. The conclusion is consistent with formula 1, which shows that S1 is the same