Ok i suck at math...here is a physics question with solution :
https://ibb.co/mqo5Va
Plz explain and elaborate me those last two steps... ?!?
收錄日期: 2021-04-24 00:16:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170227125150AAKM1fe