3^a=2则log3(8)-2log3(6)等于多少

问题描述:

3^a=2则log3(8)-2log3(6)等于多少

3^a=2→log3(2)=a
log3(8)-2log3(6)=3log3(2)-2log3(2)-2log3(3)=log3(2)-2=a-2