f(x^6)=log2x^3 则f（8）=
问题描述：
f(x^6)=log2x^3 则f（8）=
答
令 x^6=t,则x^3=√t
f(x^6)=log2x^3
也就是 f(t)=log2 √t
则f(8)=log2 (√8)
=log2 [2^(3/2]
=3/2
所以f(8)=3/2