对数:log(4)8-log(1/9)3 求值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/08 18:40:01
对数:log(4)8-log(1/9)3求值对数:log(4)8-log(1/9)3求值对数:log(4)8-log(1/9)3求值log(4)8-log(1/9)3=lg8/lg4-lg3/lg1/

对数:log(4)8-log(1/9)3 求值
对数:log(4)8-log(1/9)3 求值

对数:log(4)8-log(1/9)3 求值
log(4)8-log(1/9)3
=lg8/lg4-lg3/lg1/9
=lg2×4/2lg2-lg3/(-2×lg3)
=4/2+1/2
=5/2