Understanding the Simplified Equation for 2^-log2(x) and its Relation to x^-1

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In summary, the simplified equation for 2^-log2(x) is 1/x. This is because the logarithm base 2 of x is equivalent to the exponent that 2 must be raised to in order to equal x. The equation 2^-log2(x) is equivalent to x^-1 and both equations represent the inverse of x. The negative exponent in 2^-log2(x) indicates that the number is being raised to a power less than 1. The value of x directly affects the simplified equation 2^-log2(x), with larger x resulting in a smaller fraction and smaller x resulting in a larger fraction. The simplified equation 2^-log2(x) is significant in scientific calculations as it represents an
  • #1
repugno
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2^(-log2(x)) It reads, 2 to the power of -log base2 x

The problem is that I don't understand why this can also be written as x^-1

For some reason the base and the log2 cancel out. Can anyone explain to me why this happens, please?

1/2^(log2(x)) = 1/x
 
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  • #2
-log2(x)=log2(x^(-1)),
by the rule for logarithms:
blog(a)=log(a^(b))
 
  • #3
Or you could use that:

[tex]a^{bc} = \left(a^c \right)^b[/tex]

As [itex]- \log_2 x = (-1) \log_2 x[/itex]
 

1. What is the simplified equation for 2^-log2(x)?

The simplified equation for 2^-log2(x) is 1/x. This is because the logarithm base 2 of x is equivalent to the exponent that 2 must be raised to in order to equal x. When this is applied to 2^-log2(x), it becomes 2^-(2^y) where y is the exponent that 2 must be raised to in order to equal x. This simplifies to 1/x.

2. How does the equation 2^-log2(x) relate to x^-1?

The equation 2^-log2(x) is equivalent to x^-1. This is because 2^-log2(x) simplifies to 1/x, which is the same as x^-1. This means that both equations represent the inverse of x, which is the number that when multiplied by x, will result in 1.

3. What does the negative exponent in the equation 2^-log2(x) indicate?

The negative exponent in 2^-log2(x) indicates that the number is being raised to a power less than 1. In this case, it is being raised to the power of the logarithm base 2 of x, which is a decimal number between 0 and 1. This results in a fraction, with the numerator being 1 and the denominator being x.

4. How does the value of x affect the simplified equation 2^-log2(x)?

The value of x directly affects the simplified equation 2^-log2(x). As x increases, the exponent of 2 also increases, resulting in a smaller fraction and a larger value for the simplified equation. On the other hand, as x decreases, the exponent of 2 decreases, resulting in a larger fraction and a smaller value for the simplified equation.

5. What is the significance of the simplified equation 2^-log2(x) in scientific calculations?

The simplified equation 2^-log2(x) is significant in scientific calculations because it represents the inverse relationship between two variables. This is a common relationship seen in many scientific phenomena, and understanding this equation can help in solving various problems and making predictions. Additionally, the simplified equation is also useful in converting between different units, such as converting from meters to kilometers or from seconds to minutes.

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