<item ident="X3-8387" title="X3 | Existence/uniqueness theorem for first-order IVPs | ver. 8387"> <itemmetadata> <qtimetadata> <qtimetadatafield> <fieldlabel>question_type</fieldlabel> <fieldentry>essay_question</fieldentry> </qtimetadatafield> </qtimetadata> </itemmetadata> <presentation> <material> <mattextxml> <div class="exercise-statement"> <p> <strong>X3.</strong> </p> <p> Explain what the Existence and Uniqueness Theorem for First Order IVPs guarantees about the existence and uniqueness of solutions for the following IVP. </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'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5" alt="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5" title="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5" data-latex="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5"/> </p> </div> </mattextxml> <mattext texttype="text/html"><div class="exercise-statement"> <p> <strong>X3.</strong> </p> <p> Explain what the Existence and Uniqueness Theorem for First Order IVPs guarantees about the existence and uniqueness of solutions for the following IVP. </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'=%206%20%5C,%20%7B%5Cleft(3%20%5C,%20t%20+%203%20%5C,%20%7By%7D%20+%206%5Cright)%7D%5E%7B%5Cfrac%7B8%7D%7B3%7D%7D%20%5Chspace%7B2em%7D%20x(%203%20)=%20-5" alt="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5" title="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5" data-latex="y'= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}} \hspace{2em} x( 3 )= -5"> </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><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}" alt="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}" title="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}" data-latex="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}"/> is continuous at and nearby the initial value so a solution exists for a nearby interval. </p> <p><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}" alt="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}" title="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}" data-latex="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}"/> is continous at and nearby the initial value so the solution is unique for a nearby interval. </p> </div> </mattextxml> <mattext texttype="text/html"><div class="exercise-answer"> <h4>Partial Answer:</h4> <p><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?F(t,y)=%206%20%5C,%20%7B%5Cleft(3%20%5C,%20t%20+%203%20%5C,%20%7By%7D%20+%206%5Cright)%7D%5E%7B%5Cfrac%7B8%7D%7B3%7D%7D" alt="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}" title="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}" data-latex="F(t,y)= 6 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{8}{3}}"> is continuous at and nearby the initial value so a solution exists for a nearby interval. </p> <p><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?F_y=%2048%20%5C,%20%7B%5Cleft(3%20%5C,%20t%20+%203%20%5C,%20%7By%7D%20+%206%5Cright)%7D%5E%7B%5Cfrac%7B5%7D%7B3%7D%7D" alt="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}" title="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}" data-latex="F_y= 48 \, {\left(3 \, t + 3 \, {y} + 6\right)}^{\frac{5}{3}}"> is continous at and nearby the initial value so the solution is unique for a nearby interval. </p> </div> </mattext> </material> </flow_mat> </itemfeedback> </item>