对数函数运算:log95=a.log37=b,则log359=?
问题描述:
对数函数运算:log95=a.log37=b,则log359=?
答
log3(5)=2a,log3(7)=b
log35(9)=2ln3/(ln5+ln7)=2/(log3(5)+log3(7))=2/(2a+b)