题目内容
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[主观题]
函数f(x)=x2+2x- 5,则f(x-1)等于() (A)x2-6 (B)x2-5 (C)x2-2x-6 (D)x2-2x-5
函数f(x)=x2+2x- 5,则f(x-1)等于() (A)x2-6 (B)x2-5 (C)x2-2x-6 (D)x2-2x-5
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函数f(x)=x2+2x- 5,则f(x-1)等于() (A)x2-6 (B)x2-5 (C)x2-2x-6 (D)x2-2x-5
已知函数y=f(x)是奇函数,且f(-5)=3,则f(5)= ()
A.5
B.3
C.-3
D.-5
如果二次函数y=f(x)=3x2-mx +4的对称轴方程为x=-5,则f(-1)=() (A)37 (B)-23 (C)22 (D)-6
设函数f(x)=x2+(m-3)x+3是偶函数,则m=() (A)-3 (B)1 (C)3 (D)5