log2(3)*log3(5)*log5(8)(具体步骤)
问题描述:
log2(3)*log3(5)*log5(8)(具体步骤)
答
答案为3,用换底公式即可.
=(ln3/ln2)*(ln5/ln3)*(ln8/ln5)
=ln8/ln2
=ln2(2^3)
=3