矩形數 ???????????????

👨🏻‍🏫 學術台數學

用戶85899

2009-08-19 8:02 pm

何為矩形數???????????
要例子 , 要 "詳解"!!!!!!

更新1:

方便的話能否解答下面 http://hk.knowledge.yahoo.com/question/question?qid=7009081900695&mode=w&from=question&recommend=0&.crumb=skFWOtwyLci

更新2:

方便的答下面一條(有5分) http://hk.knowledge.yahoo.com/question/question?qid=7009081900695&mode=w&from=qu

回答 (1)

Foolish

2009-08-20 1:39 am

✔ 最佳答案

矩形數:f(x)=x(x+k)
e.g.for k=1
the series become 2 6 20 30 ......

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