超簡單平幾(急)!!!要求詳解

2011-04-30 9:54 pm
超簡單平幾(急)!!!要求詳解超簡單平幾(急)!!!要求詳解

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回答 (1)

2011-04-30 10:01 pm
✔ 最佳答案
P'P / 3 = AP / AB ....(1)P'P / 6 = PB / AB ....(2)(1) + (2) :P'P/3 + P'P/6 = (AP + PB) / ABP'P/3 + P'P/6 = AB / AB2P'P + P'P = 6P'P = 2


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