因为f=f所以f(x)是周期函数因为log2(8/3)=log2(8)-log2(3)=3-log2(3)≈1.415所以f(log2(8/3))=f(-1-log2(3))因为f(x)是偶函数所以=f(1+log2(3))=f(log2(3)-1)=f(log2(3/2))=2^(log2(3/2))-1=3/2-1=1/2选B...=f(1+log2(3))=f(log2(3)-1)?周期函数f(x-2)=f(x)f(1+log2(3))=f(1+log2(3)-2)=f(log2(3)-1)