log a b=log b a,则：ab=?a不等于b

log a b=log b a,则：ab=?a不等于b 已知 log (a) ab=1/p ,则 log (ab) a/b=__ __. log(2)5=a,log(2)7=b用ab表示log(35)28 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 a c+log b c=0(c≠1),则ab+c-abc=? log a c+log b c=0(c≠1),则ab+c-abc=? log(8)a+log(4)b^2=5,log(8)b+log(4)a^2=7,求log(2)ab的值 公式：log(a)(b)*log(b)(a)=? 设a>b>1,log(a)b+log(b)a=10/3,则log(a)b-log(b)a= log(a)(b)=log(c)(b) /log(c)(a) 怎么证log(a)(b)=log(c)(b) /log(c)(a)怎么证 求证 log(a)^(b)=1/log(b)^(a)求证 log(a)^(b)=1/log(b)^(a) a,b,x 都是正数,4[log(a)x]²+[3log(b)x]²=8log(a)x*log(b)x,则a,b的关系 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 设log(18)(9)=a log(18)(5)=b ,用ab表示log(36)(45)设log(18)(9)=a log(18)(5)=b ,用ab表示log(36)(45) 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 已知log（3）2=a log（5）2=b用ab表示log（30)90 log(a)(b)=log(b)(a)(a≠1,b≠1,c≠1),则ab=（log(x)(y))^2+(log(y)(x))^2=1,则y可用x表示为前面那个括号是底数