Find the best answers to your questions with the help of IDNLearn.com's expert contributors. Our platform provides detailed and accurate responses from experts, helping you navigate any topic with confidence.

Select the correct answer.

Consider function [tex]$g$[/tex].
[tex]\[ g(x)=\frac{5}{x-1}+2 \][/tex]

What is the average rate of change of function [tex]$g$[/tex] over the interval [tex]$[-4,3]$[/tex]?

A. [tex]$\frac{1}{2}$[/tex]
B. 2
C. [tex]$-\frac{1}{2}$[/tex]
D. [tex]$-\frac{7}{2}$[/tex]


Sagot :

To determine the average rate of change of the function [tex]\( g(x) = \frac{5}{x-1} + 2 \)[/tex] over the interval [tex]\([-4, 3]\)[/tex], follow these steps:

1. Evaluate the function [tex]\( g(x) \)[/tex] at the endpoints of the interval:

- At [tex]\( x = -4 \)[/tex]:
[tex]\[ g(-4) = \frac{5}{-4 - 1} + 2 = \frac{5}{-5} + 2 = -1 + 2 = 1 \][/tex]

- At [tex]\( x = 3 \)[/tex]:
[tex]\[ g(3) = \frac{5}{3 - 1} + 2 = \frac{5}{2} + 2 = 2.5 + 2 = 4.5 \][/tex]

2. Compute the average rate of change:

The formula for the average rate of change of a function [tex]\( g \)[/tex] over the interval [tex]\([a, b]\)[/tex] is given by:
[tex]\[ \text{Average Rate of Change} = \frac{g(b) - g(a)}{b - a} \][/tex]

Here, [tex]\( a = -4 \)[/tex] and [tex]\( b = 3 \)[/tex]:
[tex]\[ \text{Average Rate of Change} = \frac{g(3) - g(-4)}{3 - (-4)} = \frac{4.5 - 1}{3 + 4} = \frac{3.5}{7} = 0.5 \][/tex]

3. Select the correct answer:

The average rate of change of [tex]\( g(x) \)[/tex] over the interval [tex]\([-4, 3]\)[/tex] is [tex]\( 0.5 \)[/tex].

So, the correct answer is:
[tex]\[ \boxed{\frac{1}{2}} \][/tex]