已知函数f(x)满足x>=4,则f(x)=(1/2)^x,当x

2+log2(3)而3+log2(3)>4
所以原式=f[2+log2(3)+1]
=f[3+log2(3)]
=1/2^[3+log2(3)]
=1/[2^3*2^log2(3)]
=1/(8*3)
=1/24