log3 72-3log3 2 怎么化简_数学解答

log3 72-3log3 2 怎么化简

人气：233 ℃　时间：2020-04-07 16:15:18

解答

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