题目内容
设f(x)=1+5x-10x2+10x3-5x4+x5,则f(x)的反函数的解析式是( )A.f-1(x)=1+ B.f-1(x)=1+
C.f-1(x)=-1+ D.f-1(x)=1-
B
解析:f(x)=x5-5x4+10x3-10x2+5x-1+2=(x-1)5+2.
其反函数为f-1(x)=1+.
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(文)设f(x)=x5-5x4+10x3-10x2+5x+1,则f(x)的反函数f-1(x)为( )
A、f-1(x)=1+
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B、f-1(x)=1+
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C、f-1(x)=-1+
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D、f-1(x)=1-
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