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log(a)(MN)=log(a)(M)+log(a)(N) 当a>0且a≠1时,M>0,N>0,那么 (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)换底公式:log(A)M=log(b)M/log(b)A(b>0且b≠1) (5)a^(log(b)n)=n^(log(b)a)证明:...