求证 log

求证 log 求证 log(a)^(b)=1/log(b)^(a)求证 log(a)^(b)=1/log(b)^(a) 求证 log(a) (M·N)=log(a) M+log(a) N 2log(b)x=log(a)x+log(c)x求证,c^2=(ac)^[log(a)b] 求证对数不等式!若a>2,求证:log(a-1)(a)>log(a)(a+1)! log log log 求证：log底数√a真数N=2log底数a真数N 求证：log底数a真数b=1/log底数b真数a 求证：log以n为底(n+1)>log以(n+1)为底(n+2) 设a=1/log(4)3+1/log(7)3,求证a属于(3,4) 已知a>2,求证log(a-1)>loga(a+1)求证log(a-1)a>loga(a+1) 一道高一下关于对数的证明题求解设2log b(x)=log a(x)+log c(x),其中x≠1,b^2=ac,求证：log b(a)·log b(c)=1 已知n是大于1的自然数,求证log n (n+1)>log n+1 (n+2) 已知n是大于1的自然数,求证log n (n+1)>log n+1 (n+2)用高二的知识. 已知a大于2,求证：loga(a-1)·log(a+1)大于1已知a大于2,求证：log(a-1)a大于loga(a+1) 设A^2+B^2=C^2 求证 log以（C+B）为底A的对数+log(C-B)A=2log(C+B)*log(C-B)A