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Even and Odd Functions and Zeros of Functions In Exercises \(79-82\) , determine whether the function is even, odd, or neither. Then find the zeros of the function. Use a graphing utility to verify your result. $$ f(x)=\sqrt[3]{x} $$

Short Answer

Expert verified
The function f(x)=\(\sqrt[3]{x}\) is neither even nor odd, and its only zero is at x = 0.

Step by step solution

01

Determine whether the function is even, odd, or neither

An even function is a function for which f(x) = f(-x), and an odd function is a function for which -f(x) = f(-x). For the function f(x)=\(\sqrt[3]{x}\), check these conditions: \n - Substitute -x into the function: f(-x) = \(\sqrt[3]{-x}\). \n - Multiply the original function by -1: -f(x) = -\(\sqrt[3]{x}\). \n Comparing these results, we can see that neither condition is met. Therefore, the function is neither even nor odd.
02

Find the zeros of the function

A zero of a function is a value of x where f(x)=0. To find the zeros of the function f(x)=\(\sqrt[3]{x}\), we set f(x) equal to zero and solve for x. \n Thus, 0 = \(\sqrt[3]{x}\), and when you cube both sides of the equation to rid of the cube root, it is found that the only zero of the function is where x = 0.
03

Verify the results with a graphing utility

Plot the function f(x)=\(\sqrt[3]{x}\) on a graphing utility. The y-axis (i.e., when x = 0) is the only intercept of the function, and it does not demonstrate symmetry about the y-axis (even function) or the origin (odd function), confirming that the function is neither even nor odd, and that the only zero is x = 0.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Zeros of Functions
Understanding the zeros of a function is fundamental to graphing and analyzing equations. The term 'zero of a function' refers to any value of the variable where the function's output is zero. In other words, if you have a function represented as f(x), then every value x that makes f(x) = 0 is considered a zero of that function.

For example, finding the zeros of the cubic root function, represented as f(x) = \(\sqrt[3]{x}\), involves setting f(x) to zero and solving for x. Mathematically, this is shown as 0 = \(\sqrt[3]{x}\). Cubing both sides to eliminate the cubic root gives us x = 0^3, which simplifies to x = 0. Hence, the only zero of the function f(x) = \(\sqrt[3]{x}\) is at x = 0. This is an important feature as the zeros are where the graph of the function will intersect the x-axis.
Cubic Root Function
In algebra, a cubic root function is an operation that reverses the action of cubing a number. It is represented by the function f(x) = \(\sqrt[3]{x}\) where x is any real number. The graph of a cubic root function is characterized by its s-shaped curve known as a 'cubic curve'. Unlike square root functions, cubic root functions will accept negative values because the cube root of a negative number is also a negative number.

For instance, \(\sqrt[3]{-8}\) equates to -2 because (-2)^3 = -8. Understanding the behavior of cubic roots is crucial because it helps us comprehend how a function behaves at various points and how the function's graph will look. When graphing, remember that the cubic root function passes through (0,0), since 0 is the only zero, and continues to decrease and increase without any bounds as x moves away from zero.
Graphing Utility Verification
With the advancement of technology, graphing utilities such as calculators and software applications have become essential tools for verifying the features of functions. These utilities provide a visual representation of the function and make it easier to understand its properties.

To verify the zeros and the symmetry properties of the cubic root function f(x) = \(\sqrt[3]{x}\) using a graphing utility, simply input the function into the tool and examine the resulting graph. You should see that the function intersects the x-axis at x = 0, confirming the zero you calculated algebraically. Additionally, by observing the graph, you can confirm that the function does not exhibit symmetry about the y-axis or the origin, supporting the conclusion that the function is neither even nor odd.

These visual aids are particularly helpful in complementing the algebraic work and offering a more intuitive understanding of the function's overall behavior. Always ensure that the algebraic solution and the graphical representation align to validate your findings.

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