(者级1)log(a)(MN)=log(a)(M)+log(a)(N);
(2)log(a)(M/N)=log(a)(M)-log(a)(N);
(3)log(a)(M^n)=nlog(a)(M)(n∈R)
(4)log(a^360问答n)(M)=1/nlog(a)(M)(n∈R)
(5)换底公式:l怎期念表场og(A)M=log(b)M迅延关轻怎且草维/log(b)A(b>0且b≠1)
(6)log(a^n)M^m=(m/n)log(a)M
(7)对数恒等式:a^log(a)N=N; log(a)a^b见州百背黄客包蛋皇端部=b
(8)a^log(a许茶个剂斗足越图龙再)(b)=b