3嘅2n-1次方+4(3嘅2n次方)
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2(3嘅2n+1次方)
要有步驟!!!!!!
收錄日期: 2021-04-25 17:18:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080217000051KK02342