log2(5) ×log5(8)=3步骤
问题描述:
log2(5) ×log5(8)=3步骤
答
log2(5) ×log5(8)
=(lg5)/(lg2)×(lg8)/(lg5)
=(lg8)/(lg2)
=(lg2^3)/(lg2)
=3lg2/lg2
=3