Math Question. With Solution. Thanks?
回答 (1)
2016-02-03 7:40 am
✔ 最佳答案
f(x) = x cos x + tan (π/4)= x cos x + 1
f ' (x) = cos x + x ( - sin x ) + 0
= cos x - x sin x
Answer (E)
收錄日期: 2021-04-18 14:26:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160202183527AAgUbQw