作业帮log2^25*log3^2倍根号2*log5^9=
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log2^25*log3^2倍根号2*log5^9=
log2^25*log3^2倍根号2*log5^9=
log2^25*log3^2倍根号2*log5^9=
利用公式lga^b=blga知：
lg25=2lg5,lg9=2lg3,lg2倍根号2=(3/2)*lg2
log2^25*log3^2倍根号2*log5^9 （利用loga^b=lga/lgb,化成同底形式）
=[(lg25)/lg2]*[(lg2倍根号2)/lg3]*lg9/lg5（分母与分母乘,分子与分子乘）
=[2lg5*(3/2)lg2*2lg3]/[lg2*lg3*lg5]
=2*(3/2)*2=6
log2^25*log3^2倍根号2*log5^9=
log2^5*log3^2倍根号2*log5^9=
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