已知a>2,求证log(a-1)>loga(a+1)求证log(a-1)a>loga(a+1)

已知a>2,求证log(a-1)>loga(a+1)求证log(a-1)a>loga(a+1) 求证对数不等式!若a>2,求证:log(a-1)(a)>log(a)(a+1)! 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) 求证 log(a)^(b)=1/log(b)^(a)求证 log(a)^(b)=1/log(b)^(a) 已知log(2a+3)1/2 已知log(2a+3)1/2 已知a>2,求证：log(a-1)&a>loga&(a+1)其中log(a-1)&a是以（a-1)为底a的对数的意思 2log(b)x=log(a)x+log(c)x求证,c^2=(ac)^[log(a)b] 已知01比较log(a)(1/b),log(a)(b),log(b)(1/b)的大小 已知01.比较log a 1/b,log a b,log b 1/b的大小. 关于数学对数的换底公式推论的问题已知 log(2)(3) = a,log(3(7)=b,用a,b表示log(42)(56)因为log(2)(3)=a,则1/a=log(3)(2),又∵log(3)(7)=b,∴log(42)(56)=log(3)(56)/log(3)(42)=log(3)(7)+3·log(3)(2)/log(3)(7)+log(3)(2)+1=ab+3/ab+b+1 关于数学对数的换底公式推论的问题已知 log(2)(3) = a,log(3(7)=b,用a,b表示log(42)(56)因为log(2)(3)=a,则1/a=log(3)(2),又∵log(3)(7)=b,∴log(42)(56)=log(3)(56)/log(3)(42)=log(3)(7)+3·log(3)(2)/log(3)(7)+log(3)(2)+1=ab+3/ab+b+1 log(2)(a)>log(1/2)(-a) 解不等式 已知log a x=2,log b x=1,log c x=4,求log abc x 的值 已知log(a)x=1,log(b)x=2,log(c)x=4,则log(abc)x=? Log(2)1/25•log(3)1/8•log(5)1/9化简 还有已知log(18)9=a,log(18)5=b求log(36)45 值 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log底数a指数2a+1