log3以3为底5-log
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log2(25)*log3(1/16)*log5(1/9)=[2log2(5)]*[-4log3(2)]*[-2log5(3)=[2*lg5/lg2]*[-4*lg2/lg3]*[-2*lg3/lg5
换成以10为底的对数,lg3/lg2*lg4/lg3*lg5/lg4*lg2/lg5=1
再问:第二步到第三步是怎么求的?再答:
log2(log3(log4x)=0(log3(log4x)=2^0=1log4x=3^1=3x=4^3=64log3(log4(log2y)=0log4(log2y)=3^0=1log2y=4^1=
(log25+log4125)log32/log根号35=(log25+log4125)log32/log325=(log25+log4125)log252=(log25+log25根号5)log25
A=2根号3/3A属于(2/3,1)B=log(3)*(log(3)*4)/log(4)*(log(3)*4)=2.8864663987286C=log2(sin72°)因为sin72°小于1所以lo
6手机难打对数,用换底功式,等我回家用电脑打给你过程?
log以3为底2的对数log以2为底3的对数>log以2为底2的对数=1>log以3为底2的对数
log(8)9=a,log(3)5=b根据换底公式log(8)9=log(3)9/log(3)8=2/[3log(3)2]=a∴log(3)2=2/(3a)∴log(10)2=log(3)2/log(
log2(25)*log3(4)*log5(9)=lg25/lg2*lg4/lg3*lg9/lg5(换底公式)=lg5^2/lg2*lg2^2/lg3*lg3^2/lg5=2lg5/lg2*2lg2/
8再问:是不是换成分数形式可以互相约掉再答:log2(25)*log3(4)*log5(9)=lg25*lg4*lg9/lg2*lg3*lg4=log2(4)*log3(9)*log5(25)=2*2
log2(25)*log3(4)*log5(9)=lg25/lg2*lg4/lg3*lg9/lg5(换底公式)=lg5^2/lg2*lg2^2/lg3*lg3^2/lg5=2lg5/lg2*2lg2/
5的2倍log以5为底3的对数这个是5的2倍log以5为底3的对数的次方吗?如果是的话,原式=4log3²(2)-[log3(32/9)-log3(8)]-5^log5(3²)=(
(lg3/lg5)[(3lg5)/(3lg3)]=1
log以2为底25乘以log以3为底2√2乘以log以5为底9=2log25×(3/2)log32×2log53=6log25×log32×(log23/log25)=6(log25×1/log52)
LOg1/3(10)=lg10/lg1/3=1/(-lg3)=-1/lg30故有log3(4)>log1/3(10)
【参考答案】log5(3x-2)>log5(x+1)即不等式组:3x-2>0①x+1>0②3x-2>x+1③解这个不等式组得x>2/3x>-1x>3/2∴原不等式组的解集是x>3/2有不理解的地方欢迎
原式=(LOG(2^2)3+log(2^3)3)*(log(3)2+log(3^2)2)=((1/2)*LOG(2)3+(1/3)*log(2)3)*(log(3)2+(1/2)*log(3)2)=(
log_3[log_4(log_5(a))]=0(1)log_4[log_3(log_5(b))]=0(2)(1)=>log_4(log_5(a))=1=>log_5(a)=4=>a=5^4(2)=>