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vixinha1
@vixinha1
December 2023
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Resolva as equações exponenciais a seguir:
a) [tex]2^{2}[/tex] = 8
b)[tex]3^{x-2}[/tex] = 81
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poty
Resposta:
Explicação passo a passo:
a) 2² = 8 --> colocamos o 8 na base 2 também
2² = 2³ = 2² . 2
2² , 2 = 8
2³ = 8
b) 3ˣ⁻² = 81
3ˣ⁻² = 3⁴ <-- as bases iguais ,igualamos os expoentes
x - 2 = 4
x = 4 + 2
x = 6
Verificando x = 6 na equação dada:
3ˣ⁻² = 81
3⁶⁻² = 81 --> 3⁴ = 81 (3.3.3.3 = 81)
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Thanks 1
poty
Por naa,Vixinha ! Bons Estudos.
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Resposta:
Explicação passo a passo:
a) 2² = 8 --> colocamos o 8 na base 2 também
2² = 2³ = 2² . 2
2² , 2 = 8
2³ = 8
b) 3ˣ⁻² = 81
3ˣ⁻² = 3⁴ <-- as bases iguais ,igualamos os expoentes
x - 2 = 4
x = 4 + 2
x = 6
Verificando x = 6 na equação dada:
3ˣ⁻² = 81
3⁶⁻² = 81 --> 3⁴ = 81 (3.3.3.3 = 81)