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用1994除以自然數的個數,得到這些自然數的平均數.對於連續的n個自然數的平均數,如果n是奇數,那麼這個平均數等於最中間的那個數;如果n是偶數,則等於最中間兩個數的平均數(較小數+0.5,較大數-0.5).1994分解質因數:…
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