摘要:函数f且f,若2≤x≤6时,f(x)=x 2-2bx+c, f与f A.f B.f C.f D.f
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设函数f(x)满足f(x+1)+f(x-1)=2x2-8x+8, f(x+1)-f(x-1)=4(x-2)且f(x-1), -, f(x)成等差数列, 则x的值一定是
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A.2 B.3 C.2和3 D.2和-3
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设函数f(x)满足f(x+1)+f(x-1)=2x2-8x+8, f(x+1)-f(x-1)=4(x-2)且f(x-1), -, f(x)成等差数列, 则x的值一定是
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A.2 B.3 C.2和3 D.2和-3
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