數學 對數問題

To Kwok Ho:
以下是有可能是你想問的對數問題，因為是你沒有加上括號

可能一：
[(3 log x^2)/(log x^2)]+3 log x
=3+3 log x

可能二：
3 log x^[2/ log (x^2)] +3 log x
=[(6 log x)/(2 log x)]+3 log x
=3+3 log x

可能三：
3 log x^{1/(log x^[2+3 log x)]}
=(3 log x)/[(2+3 log x)(log x)]
=3/(2+3 log x)

可能四：
(3 log x^2)/[(log x^2)+3(log x)]
=(6 log x)/(5 log x)
=6/5

3log(x^2)/[log(x^2)+3logx]
Sol
logx=>x>0
3log(x^2)/[log(x^2)+3logx]
=3*2logx/(2logx+3logx)
=6/5