1/9^log以3为底7 求值
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1/9^log以3为底7求值1/9^log以3为底7求值1/9^log以3为底7求值1/9^log以3为底7=3^-2log以3为底7=3^log以3为底7^-2=7^-2=1/49
1/9^log以3为底7 求值
1/9^log以3为底7 求值
1/9^log以3为底7 求值
1/9^log以3为底7
=3^-2log以3为底7
=3^log以3为底7^-2
=7^-2
=1/49
1/9^log以3为底7 求值
log以4为底3为真数×log以9为底2的对数×log以1/2为底4根号32求值
5^1-log以0.2为底3 求值
1/log以5为底7+1/log以3为底7+1/log以2为底7 求值
log以4为底3×log以9为底2+log以2为底^4√64 求值log以9为底32×log以64为底27+log以9为底2×log以4为底√27 求值
log以8为底9的对数log以27为底32对数 求值
log以9为底16×log以32为底81 求值
log 以3为底的1求值怎么做啊
(log以4为底3+log以8为底3)×(log以3为底5+log以9为底5)×(log以5为底2+log以25为底2)求值
求值:(lg2)^2+lg2*lg5+log以3为底5的对数/log以3为底的对数
(1/4)^log以4为底3+(1/5)^log以4为底3-(1/3)^log以3为底5 求值
log以3为底9+log以4为底16分之1=.
对数:log(4)8-log(1/9)3 求值
lg243/lg9求值第一问设lg2=a,lg3=b,试用a、b表示log以5为底12对数第二问已知log以2为底3的对数=a,log以3为底7的对数=b,用a、b表示log以42为底56的对数
log以2为底的1/49×log以3为底的1/16×log以7为底的1/27
log以9为底4的对数+ log以3为底8的对数除以log以1/3为底16的对数
log以4为底8的对数-log以9分之1为底3的对数-log以根号2为底4的对数
log以7为底[ log以3为底(log以2为底x) ]=0,则x^1/2等于