log(2)(3)=a log(3)(7)=b,试用a,b表示log36为底45的对数

求等式log(2)3*log(3)4*log（4)5*log(5)6*log(6)7*log(7)m=log(3)9时m的值? 已知log（14）7=a log(14)5=b 用ab表示log(35)70=log(3)4*log(4)8*log(8)m=log(4)2 求m 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)3=a,则log(6)4=（ log a 2/3 log a(2/3) 已知log(2)3=a,log(3)7=b试用a,b表示log(2)14 已知log(2)3=a,log(3)7=b,试用a,b表示log(14)56 设log(2)(3)=a,log(3)(7)=b,以a,b表示log(21)(56) 对数函数题 log a - log b = 3 log (c/2) 求 a = ______________ a=log(3)π b=log(7)6 c=log(2)0.8 哪一个大, 若log(根号3)a= -2log(3)7,则a=? 化简log(2)3 * log(3)4 * log(4)7 *log(7)16 log(3)4*log(4)8*log(8)M =log(2)16 M是多少呃.... 已知log∨2^3=a,3^b=7,求log∨12^56 log那块的数学题已知lg2=a lg3=b 试用a b 表示log(12)5已知log(2)3=a log(3)7=b 试用a b表示log(14)56括号里是底 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）