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一般三個數成等差數列時,三個數分別設為:a-d,a,a+d.一般三個數成等比數列時,三個數分別設為:a/q,a,a/q.下麵我第一種方法解題,請你用第二用方法再計算一次.前三個數分別為.a-d,a,a+ d.,由於後三個數成等比數列,所以第…
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