若log(2)3=(1-a)/a则log(3)12RT求详解

若log(2)3=(1-a)/a则log(3)12RT求详解 27-1/ 若a>0,b>0,a*b>1,log(1/2)[a]=ln2,则log(a)[b]与log(1/2)[a]的关系是：（）?(A)log(a)b< log(1/2)[a](B)log(a)b= log(1/2)[a](C)log(a)b>log(1/2)[a](D)log(a)b与log(1/2)[a] 无法比较大小我做到一半就做不下去了：a=(1/2)^(ln2)log log(2)3=a,则log(6)4=（ 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 1、若lg2=a,lg3=b,则lg√15=?（用a、b表达）2、若log(15)(5)=m,则log(15)(3)=(用m表示)3、log(2)(3)*log(3)(4)*log(4)(5)*log(5)(6)*log(6)(7)*log(7)(8）=?4、设log(3)(2)=log(2)(3^x),x=?这个对数函数我学的很不好,所以希望过 若log(根号3)a= -2log(3)7,则a=? 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） 设a>b>1,log(a)b+log(b)a=10/3,则log(a)b-log(b)a= log a 2/3 log a(2/3) 对数函数题 log a - log b = 3 log (c/2) 求 a = ______________ 若log₃2=a,则log₃8-2log₃6用a表示为?1.a-2 2.5a-2.3.3a-(1+a)² 4.3a-a²-1 若log₃2=a,则log₃8-2log₃6用a表示为?1.a-2 2.5a-2.3.3a-(1+a)² 4.3a-a²-1 若log(a)2=m,log(a)3=n,则a^2m+n= 若| log a 1/4 |=log a 1/4 ,| log b a |=-log b a 则 a b满足什么条件0＜a＜1 b＞1log旁边的a在下面 若log（3）2=a,用a表示代数式log(2)12=? 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