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Maru [420]
3 years ago
5

Help me i don't understand again...

Mathematics
2 answers:
Crazy boy [7]3 years ago
7 0
The answer would be 10 or b
8090 [49]3 years ago
3 0
I believe it is B. 10
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(UFRGS) Se 10x = 20y , atribuindo 0,3 para log2, então o valor de é
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Answer:

\frac{x}{y}=1.3

Step-by-step explanation:

<u>Informação recuperada:</u>

(UFRGS) Se 10x = 20y , atribuindo 0,3 para log 2 , então o valor de x/y é

1) Primeiro, passando o 10 para o 2º membro como base do logaritmo:

10x=20y \Rightarrow x=log_{10}20y

2) Aplicando a propriedade do produto de logaritmo:

log(AB)= logA+logB

x=log_{10}20y \Rightarrow x=log(2+10)y\Rightarrow x=(0.3+1)y \Rightarrow x=1.3y

3)  Como quero o quociente divido ambos os lados por y

\frac{x}{y}=\frac{1.3y}{y}\Rightarrow \frac{x}{y}=1.3

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