LOG2^3=A,LOG2^5=b,则log2^9/5值是多少
问题描述：
LOG2^3=A,LOG2^5=b,则log2^9/5值是多少
答
3log2=A,5log2=b, 则log2=(b-A)/2
log2^9/5=9/5log2=9/5*(b-A)/2=9(b-A)/10
答
log2^9/5
底数是2
真数是9/5
换个写法:LOG(n,m)表示以m为底n的对数
LOG(9/5,2)=LOG(9,2)-LOG(5,2)=2*LOG(3,2)-LOG(5,2)=2A-b