教我3題數學:關於log

這是什麼東西呢?會的人可以幫忙嗎?不用算出答案

給1~2個步驟加上提示1. ㏒26-㏒49=2. 4㏒10√150-㏒1054加㏒1024=3.㏒23= a 時㏒372=
1: log4 9 = log2 3 log2 6 - log2 3 = log2 6/3 = log2 2 = 12: log10 150 x 150 x 24 / 54 = log10 25500 x 24 / 54 = log10 102000 - 2log10 3 = 10log10 10 3log10 10 log10 2 - 0.9542 =10 3 0.3010- 0.9542 = 12.3468 ( log10 2 = 0.3010 log10 3 = 0.4771 )3: log2 3 = log10 3 / log10 2 = 0.4771/0.3010 =1.5850 log3 72 = 2log3 3 3log3 2 = 2 3 x ( 0.3010/0.4771 ) = 2 1.8926 = 3.8926ｐ．ｓ：有點難打　先把它抄下來再看就會很清楚了　連答案都算好了 參考資料 自己算的
㏒2 6-㏒4 9=㏒2 6-(2/2)㏒2 3=㏒2 6-㏒2 3=㏒2 (6/3)=㏒2 2=1用電腦打字

好難解釋喔~