A small manufacturer constructs refrigerators. The fixed monthly cost is [tex]\$200{,}000[/tex], and it costs [tex]\$450[/tex] to produce one refrigerator. The average cost function to produce [tex]x[/tex] refrigerators is represented by:

[tex]\[ \bar{c}(x) = \frac{200{,}000 + 450x}{x} \][/tex]

What is the horizontal asymptote of [tex]\bar{c}(x)[/tex]?

[tex]\[ y = \boxed{\quad} \][/tex]



Answer :

To determine the horizontal asymptote of the average cost function [tex]\(\bar{c}(x) = \frac{200,000 + 450x}{x}\)[/tex], let's analyze the behavior of the function as [tex]\(x\)[/tex] approaches infinity.

1. Rewrite the function:
[tex]\[ \bar{c}(x) = \frac{200,000 + 450x}{x} \][/tex]

2. Separate the terms in the numerator:
[tex]\[ \bar{c}(x) = \frac{200,000}{x} + \frac{450x}{x} \][/tex]

3. Simplify the expression:
[tex]\[ \bar{c}(x) = \frac{200,000}{x} + 450 \][/tex]

4. Analyze the terms as [tex]\(x \to \infty\)[/tex]:
- The term [tex]\(\frac{200,000}{x}\)[/tex] approaches 0 because you are dividing a constant by a larger and larger value.
- The term [tex]\(450\)[/tex] remains constant, as it is independent of [tex]\(x\)[/tex].

5. Sum the limits:
[tex]\[ \lim_{x \to \infty} \left( \frac{200,000}{x} + 450 \right) = 0 + 450 \][/tex]

Therefore, the limit of [tex]\(\bar{c}(x)\)[/tex] as [tex]\(x\)[/tex] approaches infinity is [tex]\(450\)[/tex].

Putting it all together, the horizontal asymptote of [tex]\(\bar{c}(x)\)[/tex] is:
[tex]\[ y = 450 \][/tex]

So, the horizontal asymptote of the average cost function [tex]\(\bar{c}(x)\)[/tex] is [tex]\(y = 450\)[/tex].