<item ident="S2-7726" title="S2 | Linear ODE system with elimination | ver. 7726"> <itemmetadata> <qtimetadata> <qtimetadatafield> <fieldlabel>question_type</fieldlabel> <fieldentry>essay_question</fieldentry> </qtimetadatafield> </qtimetadata> </itemmetadata> <presentation> <material> <mattextxml> <div class="exercise-statement"> <p> <strong>S2.</strong> </p> <p>Find the solution to the given system of IVPs.</p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1" alt="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1" title="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1" data-latex="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1"/> </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3" alt="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3" title="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3" data-latex="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3"/> </p> </div> </mattextxml> <mattext texttype="text/html"><div class="exercise-statement"> <p> <strong>S2.</strong> </p> <p>Find the solution to the given system of IVPs.</p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?-%7Bx%7D%20=%20-%7Bx'%7D%20-%202%20%5C,%20%7By%7D%20%5Chspace%7B2em%7Dx(0)=%20-1" alt="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1" title="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1" data-latex="-{x} = -{x'} - 2 \, {y} \hspace{2em}x(0)= -1"> </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?0%20=%202%20%5C,%20%7Bx%7D%20+%20%7By'%7D%20+%202%20%5C,%20%7By%7D%20%5Chspace%7B2em%7Dx(0)=%203" alt="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3" title="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3" data-latex="0 = 2 \, {x} + {y'} + 2 \, {y} \hspace{2em}x(0)= 3"> </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?x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}" alt="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}" title="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}" data-latex="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}"/> </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}" alt="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}" title="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}" data-latex="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, 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?x=%20-2%20%5C,%20e%5E%7B%5Cleft(2%20%5C,%20t%5Cright)%7D%20+%20e%5E%7B%5Cleft(-3%20%5C,%20t%5Cright)%7D" alt="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}" title="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}" data-latex="x= -2 \, e^{\left(2 \, t\right)} + e^{\left(-3 \, t\right)}"> </p> <p style="text-align:center;"> <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?y=%20e%5E%7B%5Cleft(2%20%5C,%20t%5Cright)%7D%20+%202%20%5C,%20e%5E%7B%5Cleft(-3%20%5C,%20t%5Cright)%7D" alt="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}" title="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}" data-latex="y= e^{\left(2 \, t\right)} + 2 \, e^{\left(-3 \, t\right)}"> </p> </div> </mattext> </material> </flow_mat> </itemfeedback> </item>