.2
: .1.2
ana n n a §
:
an = a ´ a ´ … ´ a
n
a1= a : a §
a-n = 1 : n a §
an
a0 = 1. : a :
:
55=5×5×5×5×5 , 4-2= 1
42 = 1
16
.2.2
. n m b a
· am ´ an = am + n .
· (am)n = am n .
· am
an = am – n
· (