log0.9(底数）0.5（真数）怎么转换成log2和log3啊
问题描述：
log0.9(底数）0.5（真数）怎么转换成log2和log3啊
答
(log2 0.9)/(log2 0.5)
(log3 0.9)/(log3 0.5)
答
log0.9(底数）0.5（真数)
=lg0.5/lg0.9=-lg2/[(2lg3)-1]