log(m+n)应该怎样计算

log(m+n)应该怎样计算 log(a)(M-N)怎样算 log(a)M+log(a)N=? 证明a(log(m)n)=n(log(m)a) 为什么-log（M/N)=log(N/M) log a (m^n)=(log a m)^n? 推导log(a)(M/N) log(a)M＝m,log(a)N＝n,怎么得出 log(a)(M×N)＝m+n 求证 log(a) (M·N)=log(a) M+log(a) N log(下标a)(M*N)是什么意思?= log(下标a)M+log(下标a)N 已知 log m 10＜log n 10,试比较m,n的大小已知 log m 10＜log n 10,试比较m,n的大小 log(a^n)M= 1/n log(a)(M) log(a^n)M= n log(a)(M) 哪个对啊求神回复 log(M/N)等于多少,着急... (iog(4)3+log(8)3)(log(3)2+log(9)8)怎样计算 证明对数运算法则（1）log(a)(MN)=log(a)(M)+log(a)(N); 　　（2）log(a)(M/N)=log(a)(M)-log(a)(N);（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） log(a)(mn)=log(a)(m)+log(a)(n)为什么呀? 证明log(a^m)b^n=(n/m)log(a)b 为什么log(a^n)(M)=1/n×log(a)(M)