已知log2(3)=a,试用a表示log18(2)
问题描述:
已知log2(3)=a,试用a表示log18(2)
答
log18(2)
=1/log2(18)
=1/log2(2*3^2)
=1/[log2(2)+log2 (3^2)]
=1/(1+2a)