1:
d = 開方2hr [h] ＊用h變成主項
2:
1/c^2 - cd + 1/cd - d^2
求完整解答及說明，謝謝！
【求完整解答及說明】中二數學題兩條
2013-12-11 1:08 am
回答 (1)
2013-12-11 1:34 am
✔ 最佳答案
[1]d = √(2hr)
d² = 2hr
2hr = d²
h = d²/(2r)
[2]
1/(c²-cd) + 1/(cd-d²)
= 1/[c(c-d)] + 1/[d(c-d)]
= d/[cd(c-d)] + c/[cd(c-d)]
= (d+c)/[cd(c-d)]
= (c+d)/[cd(c-d)]
收錄日期: 2021-04-28 14:25:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20131210000051KK00120