1) ar =bex=log,b
(a,b >0; a¥ 1)
2) gee? — b
3) log, a’ =b
4)log, 1=0
5)log, a=1
6)log, (6,5, ) =log, 6, +log, 5;
7)log, N =log„5, —log„ 5;
2
8)log, 6” =alog, b
9)log „0= fog b
m
Cho a>0; m,n € R ta co:
2)a° =1
3)a"™" =a” a"
m
a
4)a”” =;
a
S)(aby" =a™b™
“(]-£
LOGARIT
10)log, xÍp = biog b
n 13) log,, d =lgb =logh
IDlog, b= 28? 14)log,b=ln?
log.a
1 log, a
15) log, h —=-log„5
12)log, b=
LUY THUA
73(a”)" =g””
8)a>la" >a" am>n 90<a<la" >a" eam<n
10a” = a”
1
1a =a"
Li Thi Ngoc Thuy- Ngocthuygethpl@pmatl.com.on