问题描述: log2√5/56+log^14-1/2log2^35 (2lg2+lg3)/(2+lg0.36+2lg2) √是根号,5/56全在根号下 1个回答 分类:数学 2014-10-23 问题解答: 我来补答 log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35) =1/2log2 (5/56)-1/2log2 (35)+log2 (14) =1/2[log2 (5/56/35)]+log2 (14) =1/2log2 [1/(7^2*8)]+log2 (14) =1/2(log2 [7^(-2)*2^(-3)]+log2(2*7) =1/2[-2log2 (7)-3]+log2 (2)+log2 (7) =-log2 (7)-3/2+1+log2 (7) =-1/2 展开全文阅读