Question

已知f(x+1)=x方-3x+2,求函数f(x)的解析式

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Answer 1

解：设X+1 = M，则：X = M-1 于是，f(M) = (M-1)�0�5 - 3(M-1)+2 即：f(x) = (x-1)�0�5 - 3(x-1) + 2 = x�0�5 - 5x +6

Answer 2

f（x-1=1）=（x-1）平方-3（x-1）=2f（x）=x方-2x+1-3x+3+2=x方-5x+6f（x）=x方-5x+6

Answer 3

就f=x+1分之x方-3X+2