問題詳情
18二次函數y=-x2+2bx+a,當x=2時,y有最大值5,則a+b=
(A)1
(B)-1
(C)2
(D)3
(A)1
(B)-1
(C)2
(D)3
參考答案
答案:D
難度:計算中-1
書單:沒有書單,新增
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