420 . 810
= 410+10 . 810
= 410 . 410 . 810
= (4 . 4 . 8)10
= 12810
420 . 810
= 410+10 . 810
= 410 . 410 . 810
= (4 . 4 . 8)10
= 12810
a) Tinh :102 ; 103;104;105;106
b) Viet moi so sau duoi dang luy thua cua 10 :
1000; 1000000; 1 ti ; 1000000000000
Viet dang luy thua voi so mu lon hon 1 .
121. 169. 343. 216. 225. 128.
so sanh luy thua bang luy thua trung gian
2^500và 5^200
10^30và 2^100
27^11và 81^8
Viet phan so 11/12 duoi dang tong cua hai phan so toi gian co mau khac nhau
so sanh bang luy thua trung gian
8^5và34^7
107^50 và 73 ^75
C=3+3^2+3^3+3^4+.............+3^60
chung minh C+3 la 1 luy thua cua 3
C=3+3^2+3^3+3^4+.............+3^60
chung minh C+3 la 1 luy thua cua 3
chung to hieu sau la 1 luy thua
11111111-2222
viet bieu thuc sau thanh tich co 3 thua so
12+21+20+11+15+51