<item ident="V2-0011" title="V2 | Linear combinations | ver. 0011">
<itemmetadata>
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<fieldlabel>question_type</fieldlabel>
<fieldentry>essay_question</fieldentry>
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<presentation>
<material>
<mattextxml>
<div class="exercise-statement">
<p>
<strong>V2.</strong>
</p>
<p>Consider the following statement.</p>
<ul>
<li> The vector <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" alt="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]"/>is not a linear combination of the vectors <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" alt="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" title="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" data-latex="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]"/>. </li>
</ul>
<ol type="a">
<li> Write an equivalent statement using a vector equation.</li>
<li> Explain why your statement is true or false.</li>
</ol>
</div>
</mattextxml>
<mattext texttype="text/html"><div class="exercise-statement">
<p>
<strong>V2.</strong>
</p>
<p>Consider the following statement.</p>
<ul>
<li> The vector <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-6%20%5C%5C%20-8%20%5C%5C%20-4%20%5C%5C%204%20%5Cend%7Barray%7D%5Cright%5D" alt="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]">is not a linear combination of the vectors <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-4%20%5C%5C%200%20%5C%5C%20-3%20%5C%5C%20-2%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-3%20%5C%5C%200%20%5C%5C%20-1%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%207%20%5C%5C%200%20%5C%5C%204%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Ctext%7B%20and%20%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-2%20%5C%5C%200%20%5C%5C%20-4%20%5C%5C%20-6%20%5Cend%7Barray%7D%5Cright%5D" alt="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" title="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" data-latex="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]">. </li>
</ul>
<ol type="a">
<li> Write an equivalent statement using a vector equation.</li>
<li> Explain why your statement is true or false.</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?\operatorname{RREF} \left[\begin{array}{cccc|c} -4 & -3 & 7 & -2 & -6 \\ 0 & 0 & 0 & 0 & -8 \\ -3 & -1 & 4 & -4 & -4 \\ -2 & 1 & 1 & -6 & 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 & 0 & -1 & 2 & 0 \\ 0 & 1 & -1 & -2 & 0 \\ 0 & 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 & 0 \end{array}\right]" alt="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 & -3 & 7 & -2 & -6 \\ 0 & 0 & 0 & 0 & -8 \\ -3 & -1 & 4 & -4 & -4 \\ -2 & 1 & 1 & -6 & 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 & 0 & -1 & 2 & 0 \\ 0 & 1 & -1 & -2 & 0 \\ 0 & 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 & 0 \end{array}\right]" title="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 & -3 & 7 & -2 & -6 \\ 0 & 0 & 0 & 0 & -8 \\ -3 & -1 & 4 & -4 & -4 \\ -2 & 1 & 1 & -6 & 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 & 0 & -1 & 2 & 0 \\ 0 & 1 & -1 & -2 & 0 \\ 0 & 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 & 0 \end{array}\right]" data-latex="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 & -3 & 7 & -2 & -6 \\ 0 & 0 & 0 & 0 & -8 \\ -3 & -1 & 4 & -4 & -4 \\ -2 & 1 & 1 & -6 & 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 & 0 & -1 & 2 & 0 \\ 0 & 1 & -1 & -2 & 0 \\ 0 & 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 & 0 \end{array}\right]"/>
</p>
<ol type="a">
<li> The vector equation <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" alt="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]"/>has no solutions.</li>
<li>
<p><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" alt="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]"/> is not a linear combination of the vectors <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" alt="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" title="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" data-latex="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]"/>. </p>
</li>
</ol>
</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?%5Coperatorname%7BRREF%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7Cc%7D%20-4%20&amp;%20-3%20&amp;%207%20&amp;%20-2%20&amp;%20-6%20%5C%5C%200%20&amp;%200%20&amp;%200%20&amp;%200%20&amp;%20-8%20%5C%5C%20-3%20&amp;%20-1%20&amp;%204%20&amp;%20-4%20&amp;%20-4%20%5C%5C%20-2%20&amp;%201%20&amp;%201%20&amp;%20-6%20&amp;%204%20%5Cend%7Barray%7D%5Cright%5D%20=%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7Cc%7D%201%20&amp;%200%20&amp;%20-1%20&amp;%202%20&amp;%200%20%5C%5C%200%20&amp;%201%20&amp;%20-1%20&amp;%20-2%20&amp;%200%20%5C%5C%200%20&amp;%200%20&amp;%200%20&amp;%200%20&amp;%201%20%5C%5C%200%20&amp;%200%20&amp;%200%20&amp;%200%20&amp;%200%20%5Cend%7Barray%7D%5Cright%5D" alt="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 &amp; -3 &amp; 7 &amp; -2 &amp; -6 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; -8 \\ -3 &amp; -1 &amp; 4 &amp; -4 &amp; -4 \\ -2 &amp; 1 &amp; 1 &amp; -6 &amp; 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 &amp; 0 &amp; -1 &amp; 2 &amp; 0 \\ 0 &amp; 1 &amp; -1 &amp; -2 &amp; 0 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 1 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 0 \end{array}\right]" title="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 &amp; -3 &amp; 7 &amp; -2 &amp; -6 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; -8 \\ -3 &amp; -1 &amp; 4 &amp; -4 &amp; -4 \\ -2 &amp; 1 &amp; 1 &amp; -6 &amp; 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 &amp; 0 &amp; -1 &amp; 2 &amp; 0 \\ 0 &amp; 1 &amp; -1 &amp; -2 &amp; 0 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 1 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 0 \end{array}\right]" data-latex="\operatorname{RREF} \left[\begin{array}{cccc|c} -4 &amp; -3 &amp; 7 &amp; -2 &amp; -6 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; -8 \\ -3 &amp; -1 &amp; 4 &amp; -4 &amp; -4 \\ -2 &amp; 1 &amp; 1 &amp; -6 &amp; 4 \end{array}\right] = \left[\begin{array}{cccc|c} 1 &amp; 0 &amp; -1 &amp; 2 &amp; 0 \\ 0 &amp; 1 &amp; -1 &amp; -2 &amp; 0 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 1 \\ 0 &amp; 0 &amp; 0 &amp; 0 &amp; 0 \end{array}\right]">
</p>
<ol type="a">
<li> The vector equation <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?x_%7B1%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-4%20%5C%5C%200%20%5C%5C%20-3%20%5C%5C%20-2%20%5Cend%7Barray%7D%5Cright%5D%20+%20x_%7B2%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-3%20%5C%5C%200%20%5C%5C%20-1%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20+%20x_%7B3%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%207%20%5C%5C%200%20%5C%5C%204%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20+%20x_%7B4%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-2%20%5C%5C%200%20%5C%5C%20-4%20%5C%5C%20-6%20%5Cend%7Barray%7D%5Cright%5D%20=%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-6%20%5C%5C%20-8%20%5C%5C%20-4%20%5C%5C%204%20%5Cend%7Barray%7D%5Cright%5D" alt="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="x_{1} \left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] + x_{2} \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] + x_{3} \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] + x_{4} \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right] = \left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]">has no solutions.</li>
<li>
<p><img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-6%20%5C%5C%20-8%20%5C%5C%20-4%20%5C%5C%204%20%5Cend%7Barray%7D%5Cright%5D" alt="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" title="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]" data-latex="\left[\begin{array}{c} -6 \\ -8 \\ -4 \\ 4 \end{array}\right]"> is not a linear combination of the vectors <img style="border:1px #ddd solid;padding:5px;border-radius:5px;" src="https://latex.codecogs.com/svg.latex?%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-4%20%5C%5C%200%20%5C%5C%20-3%20%5C%5C%20-2%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-3%20%5C%5C%200%20%5C%5C%20-1%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%207%20%5C%5C%200%20%5C%5C%204%20%5C%5C%201%20%5Cend%7Barray%7D%5Cright%5D%20,%20%5Ctext%7B%20and%20%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D%20-2%20%5C%5C%200%20%5C%5C%20-4%20%5C%5C%20-6%20%5Cend%7Barray%7D%5Cright%5D" alt="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" title="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]" data-latex="\left[\begin{array}{c} -4 \\ 0 \\ -3 \\ -2 \end{array}\right] , \left[\begin{array}{c} -3 \\ 0 \\ -1 \\ 1 \end{array}\right] , \left[\begin{array}{c} 7 \\ 0 \\ 4 \\ 1 \end{array}\right] , \text{ and } \left[\begin{array}{c} -2 \\ 0 \\ -4 \\ -6 \end{array}\right]">. </p>
</li>
</ol>
</div>
</mattext>
</material>
</flow_mat>
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</item>