2.(log23+log49+log827+…+log2n3n)× log9n√32
log16的底数7的对数乘log49的底数32的对数.要过程.
log89除以log23的值为
(lg5)^2+2lg2-(lg2)^2+log23乘log34等于?
已知log23=a,log37=b,求log4256.
(log23+log89)(log34+log98+log32)=______.
设log37=a,log23=b 则log27=
已知log23=a,log35=b,求log1520
数学对数函数题若(log23)^x-(log53)^x>=(log23)^-y-(log530^-y,求证x+y>=0
log3 7·log2 9·log49 a=log4 1/2,则a=
(log5根号2*log49^81)/(log25^(1/3)*log7^立方根4)
(log5根号2*log49 81)/(log25 1/3*log7 4开3次方)=?
若log3(7)·log2(9)·log49(a)=log4(1/2),则a的值等于