1
lnx+lny=lnxy;
2
lnx-lny=ln(x/y);
3
Inxn=nlnx;
4
In(n√x)=lnx/n;
5
lne=1;
6
In1=0;
7
Iog(A*B*C)=logA+logB+logC; logA'n=nlogA;
8
logaY =logbY/logbA;
9
log(a)(MN)=log(a)(M)+log(a)(N);
10
Iog(A)M=log(b)M/log(b)A(b>0Eb#1)。
1
lnx+lny=lnxy;
2
lnx-lny=ln(x/y);
3
Inxn=nlnx;
4
In(n√x)=lnx/n;
5
lne=1;
6
In1=0;
7
Iog(A*B*C)=logA+logB+logC; logA'n=nlogA;
8
logaY =logbY/logbA;
9
log(a)(MN)=log(a)(M)+log(a)(N);
10
Iog(A)M=log(b)M/log(b)A(b>0Eb#1)。