For all your questions, big or small, IDNLearn.com has the answers you need. Discover reliable and timely information on any topic from our network of experienced professionals.

Use technology to graph the polynomial function below, then select its end behaviors.

[tex]f(x) = x^2(x-1)(x+3)(x-2)[/tex]

A. As [tex]x \rightarrow -\infty, f(x) \rightarrow -\infty[/tex]. As [tex]x \rightarrow \infty, f(x) \rightarrow -\infty[/tex].
B. As [tex]x \rightarrow -\infty, f(x) \rightarrow \infty[/tex]. As [tex]x \rightarrow \infty, f(x) \rightarrow -\infty[/tex].
C. As [tex]x \rightarrow -\infty, f(x) \rightarrow \infty[/tex]. As [tex]x \rightarrow \infty, f(x) \rightarrow \infty[/tex].
D. As [tex]x \rightarrow -\infty, f(x) \rightarrow -\infty[/tex]. As [tex]x \rightarrow \infty, f(x) \rightarrow \infty[/tex].


Sagot :

To determine the end behavior of the polynomial function [tex]\( f(x) = x^2(x-1)(x+3)(x-2) \)[/tex], we will analyze its leading term and degree.

### Step-by-Step Analysis:

1. Expand the Polynomial:
The function [tex]\( f(x) = x^2(x-1)(x+3)(x-2) \)[/tex] consists of products of four factors.

Let's first identify its leading term and degree:
[tex]\[ f(x) = x^2(x-1)(x+3)(x-2) \][/tex]

2. Degree of the Polynomial:
- The degree of [tex]\( x^2 \)[/tex] is 2.
- The degree of [tex]\( (x-1) \)[/tex] is 1.
- The degree of [tex]\( (x+3) \)[/tex] is 1.
- The degree of [tex]\( (x-2) \)[/tex] is 1.

Adding these together gives us the total degree of the polynomial:
[tex]\[ \text{Degree} = 2 + 1 + 1 + 1 = 5 \][/tex]
The polynomial is of degree 5, which means it is an odd-degree polynomial.

3. Leading Term:
When expanded, the leading term comes from the product of the highest degree terms in each of the factors:
[tex]\[ x^2 \cdot x \cdot x \cdot x = x^{5} \][/tex]
So, the leading term is [tex]\( x^5 \)[/tex].

4. End Behavior:
For a polynomial of the form [tex]\( ax^n \)[/tex]:

- If [tex]\( n \)[/tex] is odd, and [tex]\( a \)[/tex] (the leading coefficient) is positive, then as [tex]\( x \to \infty \)[/tex], [tex]\( f(x) \to \infty \)[/tex], and as [tex]\( x \to -\infty \)[/tex], [tex]\( f(x) \to -\infty \)[/tex].
- If [tex]\( n \)[/tex] is odd and [tex]\( a \)[/tex] is negative, the end behaviors would be reversed.

In our case, the leading coefficient is positive (implicitly 1 in [tex]\( x^5 \)[/tex]) since there are no negative signs involved in the expansion of [tex]\( x^5 \)[/tex].

Therefore, the end behavior follows:
[tex]\[ \begin{cases} \text{As } x \rightarrow \infty, f(x) \rightarrow \infty.\quad (\text{since the leading term } x^5 \text{ dominates})\\ \text{As } x \rightarrow -\infty, f(x) \rightarrow -\infty. \end{cases} \][/tex]

### Conclusion:
The end behaviors of the polynomial function [tex]\( f(x) = x^2(x-1)(x+3)(x-2) \)[/tex] are:
[tex]\[ \boxed{\text{As } x \rightarrow -\infty, f(x) \rightarrow -\infty. \text{ As } x \rightarrow \infty, f(x) \rightarrow \infty.} \][/tex]