Domain of a Polynomial Function

Oct 13, 2025 by windailys.com 43 views

Introduction

In mathematics, the domain of a function refers to the set of all possible input values for which the function is defined. On the other hand, the range of a function is the set of all possible output values. In this article, we will explore the domain and range of a given polynomial function, $f(x) = 5x^6$ . We will analyze the function to determine its domain and range, and provide a clear explanation of the results.

Domain of a Polynomial Function

A polynomial function is defined as a function that can be written in the form $f(x) = a_nx^n + a_{n-1}x^{n-1} + \ldots + a_1x + a_0$ , where $a_n \neq 0$ and $n$ is a non-negative integer. In the case of the given function, $f(x) = 5x^6$ , we can see that the function is a polynomial of degree 6.

To determine the domain of a polynomial function, we need to consider the values of $x$ for which the function is defined. In the case of a polynomial function, the function is defined for all real numbers, unless there are any restrictions on the values of $x$ . In this case, there are no restrictions on the values of $x$ , so the domain of the function is all real numbers.

Range of a Polynomial Function

The range of a polynomial function is the set of all possible output values. To determine the range of a polynomial function, we need to consider the behavior of the function as $x$ approaches positive and negative infinity.

In the case of the given function, $f(x) = 5x^6$ , we can see that the function is an even function, meaning that $f(-x) = f(x)$ for all $x$ . This means that the function is symmetric about the y-axis.

As $x$ approaches positive infinity, $f(x)$ also approaches positive infinity. Similarly, as $x$ approaches negative infinity, $f(x)$ also approaches positive infinity. This means that the range of the function is all positive real numbers.

Conclusion

In conclusion, the domain of the given polynomial function, $f(x) = 5x^6$ , is all real numbers. The range of the function is all positive real numbers. This means that for any real number $x$ , the function $f(x)$ will always produce a positive output value.

Answer

Based on the analysis above, the correct answer to the question is:

Domain: D. all real numbers
Range: B. $y \geq 0$

Final Thoughts

In this article, we have explored the domain and range of a given polynomial function, $f(x) = 5x^6$ . We have analyzed the function to determine its domain and range, and provided a clear explanation of the results. The domain of the function is all real numbers, and the range of the function is all positive real numbers. This means that for any real number $x$ , the function $f(x)$ will always produce a positive output value.