Consider the following. C: counterclockwise around the triangle with vertices (0, 0), (1, 0), and (0, 1), starting at (0, 0) (a) Find a piecewise smooth parametrization of the path C. (t,0) r(t) = (2-t,t-1) (0,3 – t) (b) Evaluate [(x + 4√Y) ds. 0 ≤ t ≤ 1 1≤t≤2 2 ≤t≤ 3

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### Mathematical Problem and Solution on Path Parametrization

**Problem Statement:**

Consider the following path \(C\), a counterclockwise path around the triangle with vertices \((0, 0)\), \((1, 0)\), and \((0, 1)\), starting at \((0, 0)\).

**Tasks:**

(a) Find a piecewise smooth parametrization of the path \(C\).

(b) Evaluate the line integral \(\int_C \left( x + 4\sqrt{y} \right) \, ds\).

**Solution to Part (a):**

The parametric function \(\mathbf{r}(t)\) for path \(C\) is defined piecewise over three intervals.

1. **Interval \(0 \leq t \leq 1\):**
   \[
   \mathbf{r}(t) = (t, 0)
   \]
   This segment corresponds to moving from \((0, 0)\) to \((1, 0)\) along the x-axis.

2. **Interval \(1 \leq t \leq 2\):**
   \[
   \mathbf{r}(t) = (2-t, t-1)
   \]
   This segment represents moving from \((1, 0)\) to \((0, 1)\).

3. **Interval \(2 \leq t \leq 3\):**
   \[
   \mathbf{r}(t) = (0, 3-t)
   \]
   This final segment moves from \((0, 1)\) back to \((0, 0)\).

**Solution to Part (b):**

Evaluate the line integral \(\int_C \left( x + 4\sqrt{y} \right) \, ds\).

(Note: Precise calculation steps and results are not provided in the text). 

To determine this integral, follow the parametrizations provided and compute accordingly using standard integral methods for line integrals over parametric paths.
Transcribed Image Text:### Mathematical Problem and Solution on Path Parametrization **Problem Statement:** Consider the following path \(C\), a counterclockwise path around the triangle with vertices \((0, 0)\), \((1, 0)\), and \((0, 1)\), starting at \((0, 0)\). **Tasks:** (a) Find a piecewise smooth parametrization of the path \(C\). (b) Evaluate the line integral \(\int_C \left( x + 4\sqrt{y} \right) \, ds\). **Solution to Part (a):** The parametric function \(\mathbf{r}(t)\) for path \(C\) is defined piecewise over three intervals. 1. **Interval \(0 \leq t \leq 1\):** \[ \mathbf{r}(t) = (t, 0) \] This segment corresponds to moving from \((0, 0)\) to \((1, 0)\) along the x-axis. 2. **Interval \(1 \leq t \leq 2\):** \[ \mathbf{r}(t) = (2-t, t-1) \] This segment represents moving from \((1, 0)\) to \((0, 1)\). 3. **Interval \(2 \leq t \leq 3\):** \[ \mathbf{r}(t) = (0, 3-t) \] This final segment moves from \((0, 1)\) back to \((0, 0)\). **Solution to Part (b):** Evaluate the line integral \(\int_C \left( x + 4\sqrt{y} \right) \, ds\). (Note: Precise calculation steps and results are not provided in the text). To determine this integral, follow the parametrizations provided and compute accordingly using standard integral methods for line integrals over parametric paths.
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