log3 72-3log3 2 怎么化简

分类: 作业答案 • 2021-12-31 09:39:43

问题描述：

答

log3 72-3log3 2
=log3 72-log3 2³
=log3 72-log3 8
=log3 (72/8)
=log3 9
=log3 3²
=2log3 3
=2