<item ident="C3-3702" title="C3 | Homogeneous second-order linear ODE | ver. 3702">
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<presentation>
<material>
<mattextxml>
<div class="exercise-statement">
<p>
<strong>C3.</strong>
</p>
<p>Explain how to find the general solution to each given ODE using exponential functions.</p>
<p>For each exponential solution using complex numbers, also provide an alternate general solution using only real numbers.</p>
<ol type="a">
<li>
<p style="text-align:center;">
<img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0" alt="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0" title="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0" data-latex="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0"/>
</p>
</li>
<li>
<p style="text-align:center;">
<img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?-18 \, {y} = 2 \, {y''} + 12 \, {y'}" alt="-18 \, {y} = 2 \, {y''} + 12 \, {y'}" title="-18 \, {y} = 2 \, {y''} + 12 \, {y'}" data-latex="-18 \, {y} = 2 \, {y''} + 12 \, {y'}"/>
</p>
</li>
</ol>
</div>
</mattextxml>
<mattext texttype="text/html"><div class="exercise-statement">
<p>
<strong>C3.</strong>
</p>
<p>Explain how to find the general solution to each given ODE using exponential functions.</p>
<p>For each exponential solution using complex numbers, also provide an alternate general solution using only real numbers.</p>
<ol type="a">
<li>
<p style="text-align:center;">
<img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?3%20%5C,%20%7Bx''%7D%20+%2078%20%5C,%20%7Bx%7D%20+%206%20%5C,%20%7Bx'%7D%20=%200" alt="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0" title="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0" data-latex="3 \, {x''} + 78 \, {x} + 6 \, {x'} = 0">
</p>
</li>
<li>
<p style="text-align:center;">
<img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?-18%20%5C,%20%7By%7D%20=%202%20%5C,%20%7By''%7D%20+%2012%20%5C,%20%7By'%7D" alt="-18 \, {y} = 2 \, {y''} + 12 \, {y'}" title="-18 \, {y} = 2 \, {y''} + 12 \, {y'}" data-latex="-18 \, {y} = 2 \, {y''} + 12 \, {y'}">
</p>
</li>
</ol>
</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} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, t\right)}" alt="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, t\right)}" title="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, t\right)}" data-latex="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, 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?{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-t\right)}" alt="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-t\right)}" title="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-t\right)}" data-latex="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-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} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}" alt="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}" title="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}" data-latex="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{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?%7Bx%7D%20=%20c_%7B1%7D%20e%5E%7B%5Cleft(%5Cleft(5%20i%20-%201%5Cright)%20%5C,%20t%5Cright)%7D%20+%20c_%7B2%7D%20e%5E%7B%5Cleft(-%5Cleft(5%20i%20+%201%5Cright)%20%5C,%20t%5Cright)%7D" alt="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, t\right)}" title="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, t\right)}" data-latex="{x} = c_{1} e^{\left(\left(5 i - 1\right) \, t\right)} + c_{2} e^{\left(-\left(5 i + 1\right) \, 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?%7Bx%7D%20=%20%7B%5Cleft(d_%7B1%7D%20%5Ccos%5Cleft(5%20%5C,%20t%5Cright)%20+%20d_%7B2%7D%20%5Csin%5Cleft(5%20%5C,%20t%5Cright)%5Cright)%7D%20e%5E%7B%5Cleft(-t%5Cright)%7D" alt="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-t\right)}" title="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-t\right)}" data-latex="{x} = {\left(d_{1} \cos\left(5 \, t\right) + d_{2} \sin\left(5 \, t\right)\right)} e^{\left(-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?%7By%7D%20=%20k_%7B1%7D%20t%20e%5E%7B%5Cleft(-3%20%5C,%20t%5Cright)%7D%20+%20k_%7B2%7D%20e%5E%7B%5Cleft(-3%20%5C,%20t%5Cright)%7D" alt="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}" title="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}" data-latex="{y} = k_{1} t e^{\left(-3 \, t\right)} + k_{2} e^{\left(-3 \, t\right)}">
</p>
</div>
</mattext>
</material>
</flow_mat>
</itemfeedback>
</item>
