a. Sketch the region of integration, D, for which y=√x (4x+10y) dA= (4x+10y) dy dx. y=? 2-0 y=z b. Determine the equivalent iterated integral that results from integrating in the opposite order (dx dy, instead of dy dx). That is, determine the limits of integration for which y=? (4x+10y) dA= (4x + 10y) de dy. 7² c. Evaluate one of the two iterated integrals above. Explain what the value you obtained tells you. d. Set up and evaluate a single definite integral to determine the exact area of D, A(D). e. Determine the exact average value of f(x, y) = 4x+10y over D.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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**Activity 11.3.3: Iterated Integral and Region of Integration**

Consider the iterated integral:

\[
\int_{x=0}^{x=1} \int_{y=x}^{y=\sqrt{x}} (4x + 10y) \, dy \, dx.
\]

**Tasks:**

a. **Sketch the Region of Integration, \(D\):**
   - You need to sketch the area \(D\) in the xy-plane defined by the limits \(x=0\) to \(x=1\) and \(y=x\) to \(y=\sqrt{x}\).

b. **Determine the Equivalent Iterated Integral:**
   - Find the equivalent iterated integral by swapping the order of integration (from \(dy \, dx\) to \(dx \, dy\)).
   - Determine the limits for this alternate order: 

\[
\int_{y=?}^{y=?} \int_{x=?}^{x=?} (4x + 10y) \, dx \, dy.
\]

c. **Evaluate One of the Iterated Integrals:**
   - Choose one integral to evaluate and explain the significance of the result.

d. **Determine the Exact Area of \(D\), \(A(D)\):**
   - Formulate and evaluate a single definite integral that calculates the precise area of \(D\).

e. **Calculate the Exact Average Value of \(f(x,y) = 4x + 10y\) Over \(D\):**
   - Use the results from previous parts to find the average value over the region.
Transcribed Image Text:**Activity 11.3.3: Iterated Integral and Region of Integration** Consider the iterated integral: \[ \int_{x=0}^{x=1} \int_{y=x}^{y=\sqrt{x}} (4x + 10y) \, dy \, dx. \] **Tasks:** a. **Sketch the Region of Integration, \(D\):** - You need to sketch the area \(D\) in the xy-plane defined by the limits \(x=0\) to \(x=1\) and \(y=x\) to \(y=\sqrt{x}\). b. **Determine the Equivalent Iterated Integral:** - Find the equivalent iterated integral by swapping the order of integration (from \(dy \, dx\) to \(dx \, dy\)). - Determine the limits for this alternate order: \[ \int_{y=?}^{y=?} \int_{x=?}^{x=?} (4x + 10y) \, dx \, dy. \] c. **Evaluate One of the Iterated Integrals:** - Choose one integral to evaluate and explain the significance of the result. d. **Determine the Exact Area of \(D\), \(A(D)\):** - Formulate and evaluate a single definite integral that calculates the precise area of \(D\). e. **Calculate the Exact Average Value of \(f(x,y) = 4x + 10y\) Over \(D\):** - Use the results from previous parts to find the average value over the region.
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