log2 20---log2 5+log3 4 * log4 3 等于什么

问题描述:

log2 20---log2 5+log3 4 * log4 3 等于什么

log2 20-log2 5+log3 4 * log4 3 =log2 4+log 2 5-(log2 5)+1
=2+log2 5-(log2 5)+1=3