q= 2/rp - 1/p
有冇人識計?
plz help me to solve this problem!
**寫埋步驟同ans
收錄日期: 2021-04-15 18:20:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081017000051KK01277