Question

Log0. 45 20-log 0.45 9​

Answer 1

$log_{0,45}20-log_{0,45}9=log_{\frac{9}{20}}\frac{20}{9}=-1$

Answer 2

log 15/100 (20/3)= log 3/20(20/3)=-1

Ответ: -1

Answer 3

To evaluate the expression, let's first clarify the notation:

1. log0.45: This seems to be a typo because logarithms are typically written as log(base)(number). It's unclear what the base is here. I'll assume you meant log10(0.45) since log without a base is usually taken to be log base 10.

2. 20-log0.45: Similarly, we need to specify the base of the logarithm. I'll assume it's log base 10.

3. 9​: It's not clear how the number 9 is related to the previous expressions. Please provide more context or clarify its role in the expression.

Assuming the above, the expression would be as follows:

Expression: log10(0.45) + 20 - log10(0.45)

However, this expression is redundant since we have the same logarithmic term with a positive and negative sign, canceling each other out. As a result, the expression simplifies to:

Result: 20

If there are any additional details or clarifications needed, please provide them, and I'll be happy to help further.