已知函数f(x)=log2(x²+1)(x≤0),则f-1(2)为多少
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已知函数f(x)=log2(x²+1)(x≤0),则f-1(2)为多少
已知函数f(x)=log2(x²+1)(x≤0),则f-1(2)为多少
已知函数f(x)=log2(x²+1)(x≤0),则f-1(2)为多少
f(x)=log2(x²+1)=2
x²+1=4
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