<item ident="D3-4847" title="D3 | Inverse Laplace transforms | ver. 4847"> <itemmetadata> <qtimetadata> <qtimetadatafield> <fieldlabel>question_type</fieldlabel> <fieldentry>essay_question</fieldentry> </qtimetadatafield> </qtimetadata> </itemmetadata> <presentation> <material> <mattextxml> <div class="exercise-statement"> <p> <strong>D3.</strong> </p> <p> Explain how to use convolution along with the formula <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\mathcal{L}\{e^{at})=\frac{1}{s-a}" alt="\mathcal{L}\{e^{at})=\frac{1}{s-a}" title="\mathcal{L}\{e^{at})=\frac{1}{s-a}" data-latex="\mathcal{L}\{e^{at})=\frac{1}{s-a}"/>to find the following inverse Laplace transform: </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}" alt="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}" title="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}" data-latex="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}"/> </p> </div> </mattextxml> <mattext texttype="text/html"><div class="exercise-statement"> <p> <strong>D3.</strong> </p> <p> Explain how to use convolution along with the formula <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cmathcal%7BL%7D%5C%7Be%5E%7Bat%7D)=%5Cfrac%7B1%7D%7Bs-a%7D" alt="\mathcal{L}\{e^{at})=\frac{1}{s-a}" title="\mathcal{L}\{e^{at})=\frac{1}{s-a}" data-latex="\mathcal{L}\{e^{at})=\frac{1}{s-a}">to find the following inverse Laplace transform: </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cmathcal%7BL%7D%5E%7B-1%7D%5Cleft%5C%7B%20%5Cfrac%7B3%7D%7B2%20%5C,%20%7B%5Cleft(s%20+%208%5Cright)%7D%20%7B%5Cleft(s%20-%203%5Cright)%7D%7D%20%5Cright%5C%7D" alt="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}" title="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}" data-latex="\mathcal{L}^{-1}\left\{ \frac{3}{2 \, {\left(s + 8\right)} {\left(s - 3\right)}} \right\}"> </p> </div> </mattext> </material> <response_str ident="response1" rcardinality="Single"> <render_fib> <response_label ident="answer1" rshuffle="No"/> </render_fib> </response_str> </presentation> <itemfeedback ident="general_fb"> <flow_mat> <material> <mattextxml> <div class="exercise-answer"> <h4>Partial Answer:</h4> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}" alt="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}" title="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}" data-latex="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}"/> </p> </div> </mattextxml> <mattext texttype="text/html"><div class="exercise-answer"> <h4>Partial Answer:</h4> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cfrac%7B3%7D%7B22%7D%20%5C,%20e%5E%7B%5Cleft(3%20%5C,%20t%5Cright)%7D%20-%20%5Cfrac%7B3%7D%7B22%7D%20%5C,%20e%5E%7B%5Cleft(-8%20%5C,%20t%5Cright)%7D" alt="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}" title="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}" data-latex="\frac{3}{22} \, e^{\left(3 \, t\right)} - \frac{3}{22} \, e^{\left(-8 \, t\right)}"> </p> </div> </mattext> </material> </flow_mat> </itemfeedback> </item>