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Lunsider the following polynomial function. \[ f(x)=(x-2)(x+1)^{2}(x-1)^{2} \] Answer the questions regarding the graph of \( f \). Thien, use this information to graph the function. \[ \begin{array}{l}\text { (a) Choose the end behavior of the graph of } f \text {. } \\ \text { Choose One List each real zero of } f \text { according to the behavior of the graph at the } x \text {-axis near that } \\ \text { zero. If there is more than one answer, separate them with commas. If there is no } \\ \text { answer, click on "None". } \\ \text { zero(s) where the graph crosses the } x \text {-axis: } \\ \text { Zero(s) where the graph touches, but does not cross the } x \text {-axis: }\end{array} \] (c) Find the \( y \)-intercept of the graph of \( f \) : (d) Graph \( f(x)=(x-2)(x+1)^{2}(x-1)^{2} \) by doing the following. - Plot all points where the graph of \( f \) intersects the \( x \)-axis or \( y \)-axis. - For each point on the \( x \)-axis, solost th

Ask by Spencer Coles. in the United States
Feb 25,2025

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Answer

- **End Behavior:** - As \( x \to -\infty \), \( f(x) \to -\infty \) - As \( x \to +\infty \), \( f(x) \to +\infty \) - **Zeros:** - Crosses the x-axis at \( x = 2 \) - Touches the x-axis at \( x = -1 \) and \( x = 1 \) - **Y-intercept:** - \( (0, -2) \) **Graph Description:** - The graph starts from the bottom left, rises to touch the x-axis at \( x = -1 \), continues upwards to touch the x-axis again at \( x = 1 \), then crosses the x-axis at \( x = 2 \). - It passes through the y-intercept at \( (0, -2) \). - As \( x \) approaches negative infinity, the graph goes down, and as \( x \) approaches positive infinity, it goes up. **Summary:** The function \( f(x) = (x-2)(x+1)^{2}(x-1)^{2} \) has a degree of 5 with a positive leading coefficient, resulting in the described end behavior. It crosses the x-axis at \( x = 2 \) and touches it at \( x = -1 \) and \( x = 1 \). The y-intercept is at \( (0, -2) \). The graph reflects the behavior of the zeros and the end behavior, providing a clear visual representation of the function.

Solution

It seems that I am unable to generate a graph directly. However, I can guide you on how to plot the function \( f(x) = (x-2)(x+1)^{2}(x-1)^{2} \) using the information we have gathered. ### Steps to Graph the Function 1. **Plot the X-intercepts:** - Mark the points \( (2, 0) \), \( (-1, 0) \), and \( (1, 0) \) on the x-axis. - At \( x = 2 \), the graph crosses the x-axis. - At \( x = -1 \) and \( x = 1 \), the graph touches the x-axis. 2. **Plot the Y-intercept:** - Mark the point \( (0, -2) \) on the y-axis. 3. **Determine the Behavior:** - As \( x \to -\infty \), the graph goes downwards (to \( -\infty \)). - As \( x \to +\infty \), the graph goes upwards (to \( +\infty \)). - Between the intercepts, the graph will rise and fall according to the behavior at the intercepts: - From \( (-\infty, -1) \), the graph is below the x-axis. - It touches the x-axis at \( -1 \) and turns back up. - It rises to the x-axis at \( (1, 0) \) and turns back down. - It rises again to cross the x-axis at \( (2, 0) \). 4. **Sketch the Curve:** - Start from the left, draw a curve that approaches the x-axis from below, touches at \( (-1, 0) \), rises to touch at \( (1, 0) \), and finally crosses at \( (2, 0) \). - Ensure the curve goes through the y-intercept \( (0, -2) \). ### Conclusion By following these steps, you can create an accurate sketch of the polynomial function \( f(x) \). If you have graphing software or a graphing calculator, you can input the function directly to visualize it more precisely.

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To understand the end behavior of the polynomial \( f(x)=(x-2)(x+1)^{2}(x-1)^{2} \), we look at the leading term. Since it's a third-degree polynomial (the highest power of \( x \) when expanded), the end behavior will extend towards positive infinity as \( x \) approaches positive infinity, and towards negative infinity as \( x \) approaches negative infinity. Now, for the roots: - The zeros of \( f \) are \( x = 2 \), \( x = -1 \), and \( x = 1 \). - The zero \( x=2 \) is a single root, so the graph will cross the x-axis. - The zeros \( x = -1 \) and \( x = 1 \) each have multiplicity 2, so the graph will touch the x-axis at these points without crossing. Now, for the \( y \)-intercept: To find it, plug \( x = 0 \) into the function: \[ f(0) = (0-2)(0+1)^{2}(0-1)^{2} = (-2)(1)(1) = -2. \] Thus, the \( y \)-intercept is at the point \( (0, -2) \). Next, let's plot the points where \( f(x) \) intersects the axes: - \( x \)-intercepts: \( (2, 0) \) crosses the x-axis, \( (-1, 0) \) and \( (1, 0) \) touch the x-axis. - \( y \)-intercept: \( (0, -2) \). To sketch the graph: - Start from the left (where \( y \to -\infty \)). - It will touch \( (-1, 0) \), rise to cross \( (2, 0) \), then touch at \( (1, 0) \) before going toward positive infinity on the right side. Happy graphing!

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