计算1.2log以5为底10+log以5为底0.25 2.已知lg2=0.3010,lg3=0.4771,求lg根号下45 3.【（1-log以6为底3）²+log以6为底2log以6为底18】log以4为底6

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计算1.2log以5为底10+log以5为底0.252.已知lg2=0.3010,lg3=0.4771,求lg根号下453.【（1-log以6为底3）²+log以6为底2*log以6为底18

计算1.2log以5为底10+log以5为底0.25 2.已知lg2=0.3010,lg3=0.4771,求lg根号下45 3.【（1-log以6为底3）²+log以6为底2*log以6为底18】*log以4为底6
1.2log以5为底10+log以5为底0.25
=2log以5为底10+2log以5为底0.5
=2log以5为底10×0.5
=2log以5为底5
=2
2.已知lg2=0.3010,lg3=0.4771,
lg根号下45
=lg3+1/2lg5
=lg3+1/2(1-lg2)
=0.4771+1/2×(1-0.3010)
=0.4771+0.3345
=0.8116
3.【（1-log以6为底3）²+log以6为底2*log以6为底18】*log以4为底6
=【log²以6为底2+log以6为底2*(2-log以6为底2)】*log以4为底6
=【log²以6为底2+log以6为底2+log²以6为底2】*log以4为底6
=log以6为底2*log以4为底6
=lg2/lg6*lg6/lg4
=lg2/lg6*lg6/(2lg2)
=1/2

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1. 2log以5为底10+log以5为底0.25
=2log以5为底10+2log以5为底0.5
=2log以5为底10×0.5
=2log以5为底5
=2
2. 已知lg2=0.3010，lg3=0.4771,
lg根号下45
=lg3+1/2lg5
=lg3+1/2(1-lg2)
=0.4771+1/2×(1-0.3010)
=0.4771+0.3345
=0.8116
3. 【（1-log以6为底3）²+log以6为底2*log以6为底18】*log以4为底6
=【log²以6为底2+log以6为底2*(2-log以6为底2)】*log以4为底6
=【log²以6为底2+log以6为底2+log²以6为底2】*log以4为底6
=log以6为底2*log以4为底6
=lg2/lg6*lg6/lg4
=lg2/lg6*lg6/(2lg2)
=1/2

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计算1.2log以5为底10+log以5为底0.25 2.已知lg2=0.3010,lg3=0.4771,求lg根号下45 3.【（1-log以6为底3）²+log以6为底2*log以6为底18】*log以4为底6 计算1.2log以5为底10+log以5为底0.25 2.已知lg2=0.3010,lg3=0.4771,求lg根号下45 2log以5为底10+log以5为底0.25 计算log以2为底25·log以3为底2√2·log以5为底9的结果为 . 计算:log以根号3为底2-log以3为底32/9+log以3为底8-25(log以5为底3)次方 log以8为底9＝a log以3为底5＝b 则log以10为底2＝用a,b表示 log以3为底[log以4为底（log以5为底a的对数）]=log以4为底[log以3为底（log以5为底b的对数）]=0,则a/b是?计算 log以5为底35+2log以为底根号二-log以5为底五十分之一-log以五为底14 log以2为底5为真数与log以5为底8 求(lg2)^2+lg2lg5+log(3)5/log(3)10值注：log（3）5是log以3为底 log以5为底（3x-2)>log以5为底（x+1) log以5为底3的对数×log以27为底125的对数 2log以5为底10的对数加log以5为底0.25的对数 log以1为底的(x-3)>log以3分之一底的5 计算log以2为底20的对数-log以2为底10的对数计算log以2为底25乘以log以3为底2√2乘以log以5为底9的结果为A.3 B.4 c.5 D.6 计算log以2为底25的对数乘log以3为底2倍跟2的对数乘log以5为底9的对数 log以2为底25的对数+log以3为底4的对数+log以5为底9的对数