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Determine whether the function is even, odd, or neither. Then determine whether the function's graph is symmetric with respect to the \( y \)-axis, the origin, or neither. \( f(x)=x \sqrt{4-x^{4}} \)

Ask by Knight Lambert. in the United States
Jan 25,2025

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Answer

The function is odd, and its graph is symmetric about the origin.

Solution

To determine whether the function \( f(x) = x \sqrt{4 - x^{4}} \) is even, odd, or neither, and to analyze its symmetry, follow these steps: ### 1. Determine If the Function Is Even, Odd, or Neither - **Even Function:** A function \( f(x) \) is even if \( f(-x) = f(x) \) for all \( x \) in its domain. - **Odd Function:** A function \( f(x) \) is odd if \( f(-x) = -f(x) \) for all \( x \) in its domain. - **Neither:** If neither condition is satisfied, the function is neither even nor odd. **Calculation:** \[ f(-x) = (-x) \sqrt{4 - (-x)^4} = -x \sqrt{4 - x^4} \] Comparing this with \( f(x) \): \[ f(-x) = -x \sqrt{4 - x^4} = -f(x) \] Since \( f(-x) = -f(x) \), the function is **odd**. ### 2. Determine Graphical Symmetry - **Symmetry with respect to the \( y \)-axis:** Corresponds to the function being even. - **Symmetry with respect to the origin:** Corresponds to the function being odd. - **Neither:** If the function is neither even nor odd. **Conclusion:** Since the function is odd, its graph is **symmetric with respect to the origin**. ### Final Answer: **The function is odd, and its graph is symmetric about the origin.**

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To determine whether the function \( f(x) = x \sqrt{4 - x^4} \) is even, odd, or neither, we can test \( f(-x) \): \[ f(-x) = -x \sqrt{4 - (-x)^4} = -x \sqrt{4 - x^4} = -f(x) \] Since \( f(-x) = -f(x) \), the function is odd. This implies that the graph is symmetric with respect to the origin. Now, let's talk about where this function is defined. Notice that the expression under the square root (\( 4 - x^4 \)) must be non-negative for values of \( x \) to keep \( f(x) \) real. Hence, \( x^4 \leq 4 \), or \( -\sqrt[4]{4} \leq x \leq \sqrt[4]{4} \). This will ultimately impact the visual interpretation of the graph.

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