已知二次函数y=f（x）最大值是f（1/2）=25/4，且过（2,4），求f（x）的表达式
展开全部
初中数学解决者
设y=a(x-1/2)^2+25/4(a<0)
将（2，4）代入上式，得a=-1
f（x）=-(x-1/2)^2+25/4
设y=a(x-1/2)^2+25/4(a<0)
将（2，4）代入上式，得a=-1
f（x）=-(x-1/2)^2+25/4
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
展开全部
I want to be a musicianWhen I was young,I like to listen to music very much.I think the gentle songs makes me very relaxed.So I want to be a musician in the future.My friend and I aiways buy CDs in CD stores and we like the same kind of music.I realized that I must learn more music knowledge and listen to music as much as I can.I am sure I can win
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
