Problemas
Both of these functions grow as x gets larger and larger. Which function eventually exceeds the other? f(x)=(5)/(7)(4)^x g(x)=4x+(20)/(7)
Roztwór
Héctor
maestro · Tutor durante 5 años
4.4
(263 Votos)
Respuesta
To determine which function eventually exceeds the other as
gets larger, we need to analyze the growth rates of the two functions.First, let's examine the function \( f(x) = \frac{5}{7}(4)^x \). This is an exponential function with a base of 4. Exponential functions grow much faster than linear functions as
increases.Next, let's look at the function \( g(x) = 4x + \frac{20}{7} \). This is a linear function with a slope of 4. Linear functions grow at a constant rate, which is slower compared to the exponential growth of \( f(x) \).To provide a more concrete comparison, let's calculate the values of both functions for a few larger values of
:For
:
For
:
As we can see, even for relatively small values of
, \( f(x) \) grows significantly faster than \( g(x) \). This trend will continue as
becomes larger.Therefore, the function \( f(x) = \frac{5}{7}(4)^x \) will eventually exceed the function \( g(x) = 4x + \frac{20}{7} \) as
gets larger.