log2 3 =log 1/2 1/3 为什么 怎么算的?(log3/1(2)、log3/1(2/1)、log2/1(3)、log2/1(3/1
更新时间:2021-08-15 19:17:27 • 作者:LOIS •阅读 2233
log3/1(2)、log3/1(2/1)、log2/1(3)、log2/1(3/1)的大小关系
log3/1(2)、log3/1(2/1)、log2/1(3)、log2/1(3/1)的大小关系
log1/3(2)
=log3(2)/log3(1/3)
=-log3(2)
log1/3(1/2)
=log3(1/2)/log3(1/3)
=log3(2)
log1/2(3)
=log3(3)/log3(1/2)
=-1/log3(2)
log 1/2(1/3)
=log3(1/3)/log3(1/2)
=1/log3(2)
由于0<log3(2)<1
所以
1/log3(2)>log3(2)>-log3(2)>-1/log3(2)
log1/2(1/3)>log1/3(1/2)>log1/3(2)>log1/2(3)
log以2为底3的对数是怎么算的
-log以2为底3的对数次方log以2为底1/3的对数次方
1/2log以2为底3的对数,怎么求?
解:1/2*log(2)3
=1/2*lg3/lg2
=1/2*0.4771/0.3010
=1/2*1.5849624999
=0.79248125
log2 3的对数是多少
(4)的log2(底数)3(对数)次幂
= [2的log2(底数)3(对数)次幂] ^2
= 3^2
= 9
(lg5)的平方+lg2乘以lg5+(4)的log2(底数)3(对数)次幂
= lg5(lg5+lg2) + 9
= lg5 + 9