f[log2(x)]=2^x,求f(3)

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f[log2(x)]=2^x,求f(3)f[log2(x)]=2^x,求f(3)f[log2(x)]=2^x,求f(3)f(3)=f(log2(8))=2^8=256log2(x)=3x=2^3=8f

f[log2(x)]=2^x,求f(3)
f[log2(x)]=2^x,求f(3)

f[log2(x)]=2^x,求f(3)
f(3) = f(log2(8)) = 2^8 = 256

log2(x)=3
x=2^3=8
f(3)=2^x
=2^8
=256。