Log(2)1/25•log(3)1/8•log(5)1/9化简 还有已知log(18)9=a,
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Log(2)1/25•log(3)1/8•log(5)1/9化简 还有已知log(18)9=a,log(18)5=b求log(36)45 值
Log(2)1/25•log(3)1/8•log(5)1/9=(lg1/25/lg2)(lg1/8/lg3)(lg1/9/lg5)
=(lg1/25/lg5)(lg1/8/lg2)(lg1/9/lg3)=(-2)(-3)(-2)=-12
log(18)9=a,log(9)18=1/a=log(9)9+log(9)2=1+log(9)2,log(9)2=1/a-1=(1-a)/a
log(18)9/log(18)5=log(5)9=a/b
,log(18)5=b,log(5)18=1/b=log(5)9+log(5)2=a/b+log(5)2,log(5)2=1/b-a/b=(1-a)/b
log(18)9+log(18)5=log(18)45=a+b
log(45)2=lg2/(lg5+lg9)=1/[log(2)5+log(2)9]=1/[b/(1-a)+a/(1-a)]=(1-a)/(a+b)
log(36)45=lg45/lg18+lg2=1/[log(45)18+log(45)2]=1/[1/(a+b)+(1-a)/(a+b)]=(a+b)/(2-a)
=(lg1/25/lg5)(lg1/8/lg2)(lg1/9/lg3)=(-2)(-3)(-2)=-12
log(18)9=a,log(9)18=1/a=log(9)9+log(9)2=1+log(9)2,log(9)2=1/a-1=(1-a)/a
log(18)9/log(18)5=log(5)9=a/b
,log(18)5=b,log(5)18=1/b=log(5)9+log(5)2=a/b+log(5)2,log(5)2=1/b-a/b=(1-a)/b
log(18)9+log(18)5=log(18)45=a+b
log(45)2=lg2/(lg5+lg9)=1/[log(2)5+log(2)9]=1/[b/(1-a)+a/(1-a)]=(1-a)/(a+b)
log(36)45=lg45/lg18+lg2=1/[log(45)18+log(45)2]=1/[1/(a+b)+(1-a)/(a+b)]=(a+b)/(2-a)
log(2)1/25乘以log(3)1/8乘以log(5)1/9
log(2)(25)×log(3)(1/16)×log(5)(1/9)=?
2^log(4)(3)加3^log(9)(1/4)加5^log(1/25)(2)
三道数学填空题!(1)[(log(4)(3)+log(8)(3)][log(3)(2)+log(9)(8)]=(2)已知
log(2)(25)*log(3)(根号2)*log(5)(9)
64^1/3-(-2/3)^0+log(2)8+(log(8)9)/(log(2)3)
化简2log`5(10)+log`3(0.25)+log`1/5(125)=
-5log⑨4+log③32/9-5^log⑤3-(1/64)^-2/3
已知lg2=0.301,lg3=0.477,求(1)log(2)1000,(2)log(5)0.5,(3)log(9)8
已知log(1/7)[log(3)(log(2)x)]=0
[log(3)3^1/2]^2+log(0.25)1/4+9log5根号5-log(根号3)1=?
对数:log(4)8-log(1/9)3 求值