分类：教育/科学-学习帮助
问题：高一数学计算：(LOG2(5)+LOG4(0.2))(LOG5( 
计算：(LOG2(5)+LOG4(0.2))(LOG5(2)+LOG25(0.5))
回答：(LOG2_5 + LOG4_0.2)(LOG5_2 + LOG25_0.5) 
=[LOG2_5 - LOG4_5][LOG5_2 - LOG25_2]
=[LOG4_25 - LOG4_5][LOG25_4 - LOG25_2]
=[LOG4_5][LOG25_2]
=[(1/2)LOG2_5][(1/2)LOG5_2]
=1/4