c. Find the critical points for this DE, draw a one- dimensional phase portrait, and classify each critical point as an attractor, repeller, or semi-stable.

Advanced Engineering Mathematics
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ISBN:9780470458365
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Chapter2: Second-order Linear Odes
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Need help only solving part c. Thank you

**For the differential equation** 

\[ \frac{dy}{dx} = \frac{1}{2}(y+2)(y-1)^2 \]

**a. Sketch the direction field where** \(-2 \leq x \leq 2\) **and** \(-2 \leq y \leq 2\). **Place the lineal elements on top of the dots.**

**Fill in this table:**

\[ 
\begin{array}{c|c}
y & \frac{dy}{dx} \\ \hline
2 & \ldots \\ 
1 & \ldots \\
0 & \ldots \\ 
-1 & \ldots \\
-2 & \ldots \\
\end{array}
\]

**Graph Explanation:** 

The graph is a grid with orange dots marking points from \((-2, -2)\) to \((2, 2)\). The x-axis ranges from -2 to 2, and the y-axis also ranges from -2 to 2. 

**b. Explain the similarity in the lineal elements for each vertical strip.**

The lineal elements within each vertical strip on the direction field exhibit similar slopes at corresponding y-values. This suggests that the slope (or direction of the lineal elements) depends solely on the y-value, as the differential equation is independent of x.

**c. Find the critical points for this DE, draw a one-dimensional phase portrait, and classify each critical point as an attractor, repeller, or semi-stable.**
Transcribed Image Text:**For the differential equation** \[ \frac{dy}{dx} = \frac{1}{2}(y+2)(y-1)^2 \] **a. Sketch the direction field where** \(-2 \leq x \leq 2\) **and** \(-2 \leq y \leq 2\). **Place the lineal elements on top of the dots.** **Fill in this table:** \[ \begin{array}{c|c} y & \frac{dy}{dx} \\ \hline 2 & \ldots \\ 1 & \ldots \\ 0 & \ldots \\ -1 & \ldots \\ -2 & \ldots \\ \end{array} \] **Graph Explanation:** The graph is a grid with orange dots marking points from \((-2, -2)\) to \((2, 2)\). The x-axis ranges from -2 to 2, and the y-axis also ranges from -2 to 2. **b. Explain the similarity in the lineal elements for each vertical strip.** The lineal elements within each vertical strip on the direction field exhibit similar slopes at corresponding y-values. This suggests that the slope (or direction of the lineal elements) depends solely on the y-value, as the differential equation is independent of x. **c. Find the critical points for this DE, draw a one-dimensional phase portrait, and classify each critical point as an attractor, repeller, or semi-stable.**
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