计算log2 1/4+2^log2 2+91lg1+(0.25)^(1/2)×(-1/27)^(-2/3).

问题描述:

计算log2 1/4+2^log2 2+91lg1+(0.25)^(1/2)×(-1/27)^(-2/3).

=-2+2+0+(1/2)*9
=9/2