2若f(x)=-3x2+ax+b,在x=2時,有最大值-5,則數對(a,b)=?

2017-08-29 6:55 pm

回答 (1)

2017-08-29 7:50 pm
✔ 最佳答案
若f(x)=-3x^2+ax+b,在x=2時,有最大值-5,則數對(a,b)=?
Sol
f(x)=-3(x-2)^2-5
=-3(x^2-4x+4)-5
=-3x^2+12x-17
(a,b)=(12,-17)


收錄日期: 2021-04-30 22:27:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170829105528AAfOxqg

檢視 Wayback Machine 備份