Report - 中國π的一頁滄桑 - kh.edu.tmathematic/data/literary/L002.pdf · r 2 = 885145 1 2 2 14159265 885145 r r == $Ö 1 22 2 [][]15 r == = 2 c ¡ø ø 11 22 3 3 11 [] ,0 1, rr rr =+

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