logN=log(3)6+log(4)12-log(2)9是log(2)9 是以2为底的……怎么能化成2呢？

logN=log(3)6+log(4)12-log(2)9是log(2)9 是以2为底的……怎么能化成2呢？ 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? log(2)3=a,则log(6)4=（ log(27)16/log(3)4= 2 log(3x)= log 4 +log(6-x)怎么求...急 log(2)2/3+log(2)6+log(4)8= log∨6 (64)*log∨4 (1/27)*log∨3( 36) log∨6 (64)*log∨4 (1/27)*log∨3( 36) log(3)4*log(4)8*log(8)M =log(2)16 M是多少呃.... 求大神指点,lingo出现错误代码11,这是为什么?model:!目标函数;min=(0.005*((@log(1+k))^2+(@log(1+2*k))^2+(@log(1+3*k))^2+(@log(1+4*k))^2+(@log(1+5*k))^2))!/(@log(1+k)+@log(1+2*k)+@log(1+3*k)+@log(1+4*k)+@log(1+5*k));!约束条件;(@log 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 log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解,求每步详...log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解, 根式的对数等于被开方数的对数除以根指数log[N^(1/n)]=(1/n)logN 不懂? log 9 X/Y=1/2(log 3 X - log 3 Y) log 9 X/Y=1/4 3log 3 X =2log 3 Y find X and Y 化简2log`5(10)+log`3(0.25）+log`1/5(125)=(2) log`2(根号2）+log`9(27）+（1/4)^log`4(1/16) 注意 `为下角标 已知log（2）[log（3)(log(4) x)] = log(3) [log(4) (log(2) y)]=0,求x+y的值 log(4)6能不能化简为log(2)3呢? 还有log(3)x=3分之1 x=多少 [log(3)3^1/2]^2+log(0.25)1/4+9log5根号5-log（根号3）1=?