呢條數要點計
2011-04-01 4:57 am
回答 (1)
2011-04-01 5:14 am
✔ 最佳答案
http://i1090.photobucket.com/albums/i376/Nelson_Yu/1-181.jpg圖片參考：http://i1090.photobucket.com/albums/i376/Nelson_Yu/1-181.jpg
2011-03-31 21:17:26 補充：
修正,中間幾行漏了數字2
=√x/2 (1 – x - 2√x √(1 - 2x))
=√x/2 (1 - 2x - 2√x √(1 - 2x) + x)
=√x/2 ([√(1 - 2x)]^2 - 2√x √(1 - 2x) + [√x]^2 )
=√x/2 (√(1 - 2x) - √x)^2 ≥ 0
收錄日期: 2021-04-23 23:24:55
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110331000051KK01183