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Pot¦gowanieipierwiastkowanie
Wzory: Przykłady:
Wzory
a 0 =1 2 0 =1 5 0 =1 ( 3) 0 =1
Wzory: Przykłady:
a 1 = a 2 1 =2 5 1 =5 ( 3) 1 = 3
log a 1=0 log 3 1=0 log 1 2 1=0
log a a =1 log 3 3=1 log 1 2 1 2 =1
log a a k = k log 2 2 3 =3 log 5 5 3 =3
log a x k = k log a x log 3 2 5 =5log 3 2 log3 4 =4log3
a log a x = x 3 log 3 5 =5 ( 1 2 ) log 1 2 7 =7
log a ( x · y )=log a x +log a y log 2 (3 · 5 )=log 2 3+log 2 5
log 3 (9
a x = 1
a x
2 1 = 1
2 5 4 = 1
5 4
( 3) 8 = 1
( 3) 8
a
b
x
b
a
x
2 3
1 = 3 2
1 2
3 = 2 1
3 10 7
2 = 7 10
2
=
a 1 n = n p
p
a 9 1 2 =
9=3
8 1 3 = 3 p 8=2
p
p
3)=log 3 9+log 3
3
a m n =( n p a ) m = n p a m 9 3 2 =( p 9) 3 =3 3 =27
4 2 3 =( 3 p
4) 2 = 3 p
4 2 = 3 p
16= 3 p
8 · 2=2 3 p
log a
x
y =log a x log a y log 2 3 5 =log 2 3 log 2 5
log 3
2
9 =log 3
p
3 log 3 9
log 11 2
c –dowolnaliczbaspełniaj¡cawarunki log 2 3= log 15 3
log 2 3= log 11 3
a x · a y = a x + y
2 3 · 2 5 =2 3+5 =2 8
log 15 2
3 4 · 3 3 =3 4+( 3) =3 1 =3
log a b = 1
log 3 8= 1
log b a
log 8 3
a y = a x y 2 5
2 3 =2 5 3 =2 2 =4
3 4
3 6 =3 4 6 =3 2 = 1
3 2 = 1
9
( a x ) y = a x · y
(2 3 ) 4 =2 3 · 4 =2 12 =4096
(3 2 1 2 ) 2 =3 2 1 2 · 2 =3 5 =243
( a · b ) x = a x · b x
(3
p
5) 2 =3 2 · (
p
5) 2 =9 · 5=45
a
b
x
= a x
b x
3
5
2
= 3 2
5 2 = 9
25
p
! 2
p
3
2
= (
2 2 = 3
3) 2
4
n p a · n p
b = n p
ab
p
2 ·
p
3=
p
6 3 p
2 · 3 p
4= 3 p
8=2 5 p
3 · 5 p
4= 5 p
12
r a
b =
n p a
n p
r 4
9 =
p
4 p
9 = 2
r 5
8 =
3 p
5
3 p
5
n
3
3 p
8 =
b
3
2
p 3
log a b = log c b
log c a
a x
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