Question

化簡(jiǎn)

(log232+log 1 2 8-2log 1 4 1)(lg2+lg5)lg8

lg2

的值為

3

．

Answer 1

分析：根據(jù)指數(shù)運(yùn)算率化簡(jiǎn)即可

解答：解：原式=

(log225+log2-123-20) ( lg2×5)lg23

lg2

=

(5-3-1)×1×3lg2

lg2

=3
故答案為：3

點(diǎn)評(píng)：本題考查對(duì)數(shù)運(yùn)算，要求能熟練應(yīng)用對(duì)數(shù)運(yùn)算法則．屬簡(jiǎn)單題