數學題....點描述?
回答 (1)
2007-08-27 2:20 am
✔ 最佳答案
1. The signs of x- and y-coordinates i .e. (4, -1) are changed to opposite.2. The x- and y-coordinates i .e. (4, -1) are multiplied by -1.
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https://hk.answers.yahoo.com/question/index?qid=20070826000051KK02032