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		<id>https://minidemo.mathonline.se/index.php?action=history&amp;feed=atom&amp;title=1.5_L%C3%B6sning_5b</id>
		<title>1.5 Lösning 5b - Versionshistorik</title>
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		<updated>2026-06-27T00:16:26Z</updated>
		<subtitle>Versionshistorik för denna sida på wikin</subtitle>
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	<entry>
		<id>https://minidemo.mathonline.se/index.php?title=1.5_L%C3%B6sning_5b&amp;diff=3085&amp;oldid=prev</id>
		<title>Taifun den 10 mars 2011 kl. 13.43</title>
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				<updated>2011-03-10T13:43:46Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Äldre version&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Versionen från 10 mars 2011 kl. 13.43&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Rad 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Rad 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;::&amp;lt;math&amp;gt;\begin{align} (&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^x + &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^{x&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;+&lt;/del&gt;1}) \&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;,/&lt;/del&gt;\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, 4&lt;/del&gt;\; &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;9 &lt;/del&gt; \qquad \; | \; \cdot &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;4 &lt;/del&gt; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;::&amp;lt;math&amp;gt;\begin{align} (&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^x + &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^{x&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;-&lt;/ins&gt;1}) \&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;cdot {2 &lt;/ins&gt;\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;over 3}&lt;/ins&gt;\; &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;32 &lt;/ins&gt; \qquad \; | \; \cdot &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{3 \over 2} &lt;/ins&gt; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 3&lt;/del&gt;^x + &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^{x&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;+&lt;/del&gt;1} &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;36 &lt;/del&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 2&lt;/ins&gt;^x + &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^{x&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;-&lt;/ins&gt;1} &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;48 &lt;/ins&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 3&lt;/del&gt;^x + &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^x \cdot &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^1 &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;36 &lt;/del&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160;  2&lt;/ins&gt;^x + &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^x \cdot &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{-&lt;/ins&gt;1&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;} &lt;/ins&gt;&amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;48 &lt;/ins&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 3&lt;/del&gt;^x \cdot (1+&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;) &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;36 &lt;/del&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160;  2&lt;/ins&gt;^x \cdot (1+&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{1\over 2}&lt;/ins&gt;) &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;48 &lt;/ins&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;4 &lt;/del&gt;\cdot &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;3&lt;/del&gt;^x &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;36 &lt;/del&gt; \qquad | \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;/ 4&amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;/del&gt;\\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{3 \over 2} &lt;/ins&gt;\cdot &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^x &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;48 &lt;/ins&gt; \qquad &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\; &lt;/ins&gt;| \; \&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;cdot {2 &lt;/ins&gt;\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;over &lt;/ins&gt;3&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;}\\&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;/del&gt;3^x &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt; 9 &lt;/del&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 2&lt;/ins&gt;^x &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;32 &lt;/ins&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 3&lt;/del&gt;^x &amp;amp; = \; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt; 3&lt;/del&gt;^&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;2 &lt;/del&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; 2&lt;/ins&gt;^x &amp;amp; = \; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/ins&gt;^&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;5 &lt;/ins&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; \\&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;/del&gt;x &amp;amp; = \;&amp;#160; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;2&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &amp;#160; &lt;/ins&gt;x &amp;amp; = \;&amp;#160; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;5&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160; &amp;#160; &amp;#160; &amp;#160; \end{align} &amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160; &amp;#160; &amp;#160; &amp;#160; \end{align} &amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Taifun</name></author>	</entry>

	<entry>
		<id>https://minidemo.mathonline.se/index.php?title=1.5_L%C3%B6sning_5b&amp;diff=3084&amp;oldid=prev</id>
		<title>Taifun: Created page with &quot;::&lt;math&gt;\begin{align} (3^x + 3^{x+1}) \,/\, 4\; &amp; = \; 9  \qquad \; | \; \cdot 4  \\                                   3^x + 3^{x+1} &amp; = \; 36                         \\         ...&quot;</title>
		<link rel="alternate" type="text/html" href="https://minidemo.mathonline.se/index.php?title=1.5_L%C3%B6sning_5b&amp;diff=3084&amp;oldid=prev"/>
				<updated>2011-03-10T13:33:14Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;::&amp;lt;math&amp;gt;\begin{align} (3^x + 3^{x+1}) \,/\, 4\; &amp;amp; = \; 9  \qquad \; | \; \cdot 4  \\                                   3^x + 3^{x+1} &amp;amp; = \; 36                         \\         ...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Ny sida&lt;/b&gt;&lt;/p&gt;&lt;div&gt;::&amp;lt;math&amp;gt;\begin{align} (3^x + 3^{x+1}) \,/\, 4\; &amp;amp; = \; 9  \qquad \; | \; \cdot 4  \\&lt;br /&gt;
                                  3^x + 3^{x+1} &amp;amp; = \; 36                         \\&lt;br /&gt;
                            3^x + 3^x \cdot 3^1 &amp;amp; = \; 36                         \\&lt;br /&gt;
                                3^x \cdot (1+3) &amp;amp; = \; 36                         \\&lt;br /&gt;
                                    4 \cdot 3^x &amp;amp; = \; 36  \qquad | \; / 4        \\&lt;br /&gt;
                                            3^x &amp;amp; = \;  9                         \\&lt;br /&gt;
                                            3^x &amp;amp; = \;  3^2                       \\&lt;br /&gt;
                                              x &amp;amp; = \;  2&lt;br /&gt;
        \end{align} &amp;lt;/math&amp;gt;&lt;/div&gt;</summary>
		<author><name>Taifun</name></author>	</entry>

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