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Joislane
@Joislane
January 2020
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Funções exponenciais ! a) 2x=64 b)3x=343 c)9x=27 d)1/5x= 125
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Mkse
Funções exponenciais !
DEIXAR bases IGUAIS
a) 2x=64
2× = 64 ( 64 = 2x2x2x2x2x2 = 2⁶)
2× = 2⁶ ( BASES iguais)
x = 6
b)3x=343 ????????? ( 243)
3× = 243= (3x3x3x3x3 = 3⁵)
3× = 3⁵ ( BASES iguais)
x = 5
c)9x=27
9× = 27 ( = 3x3= 3²)
( = 27 = 3x3x3 = 3³)
9× = 27
(3²)×= 3³
3²× = 3³ ( BASES iguais)
2x = 3
x = 3/2
d)1/5x= 125
1/5× = 125 ( 125 = 5x5x5 = 5³)
1/5× = 5³ ( atenção 1/5 = 1.5⁻× = 5⁻×)
5⁻× = 5³ (BASES iguais)
- x = 3
x = - 3
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DEIXAR bases IGUAIS
a) 2x=64
2× = 64 ( 64 = 2x2x2x2x2x2 = 2⁶)
2× = 2⁶ ( BASES iguais)
x = 6
b)3x=343 ????????? ( 243)
3× = 243= (3x3x3x3x3 = 3⁵)
3× = 3⁵ ( BASES iguais)
x = 5
c)9x=27
9× = 27 ( = 3x3= 3²)
( = 27 = 3x3x3 = 3³)
9× = 27
(3²)×= 3³
3²× = 3³ ( BASES iguais)
2x = 3
x = 3/2
d)1/5x= 125
1/5× = 125 ( 125 = 5x5x5 = 5³)
1/5× = 5³ ( atenção 1/5 = 1.5⁻× = 5⁻×)
5⁻× = 5³ (BASES iguais)
- x = 3
x = - 3