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		<title>2.2 Lösning 8a - Versionshistorik</title>
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		<updated>2026-11-05T08:48:13Z</updated>
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		<id>https://wiki.mattekollen.se/index.php?title=2.2_L%C3%B6sning_8a&amp;diff=16905&amp;oldid=prev</id>
		<title>Taifun den 3 november 2014 kl. 13.45</title>
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				<updated>2014-11-03T13:45:19Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Ny sida&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Definitionen till ändringskvot i intervallet mellan &amp;lt;math&amp;gt; x \, &amp;lt;/math&amp;gt; och &amp;lt;math&amp;gt; x+h \, &amp;lt;/math&amp;gt;:&lt;br /&gt;
&lt;br /&gt;
::&amp;lt;math&amp;gt; {\Delta y \over \Delta x} \; = \; {f(x + h) \, - \, f(x) \over h} &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Tillämpad på vårt exempel &amp;lt;math&amp;gt; y = f(x) = {\color{Red} {2\,x^2 - 5\,x + 32}} &amp;lt;/math&amp;gt;:&lt;br /&gt;
&lt;br /&gt;
::&amp;lt;math&amp;gt; f(x + h) = 2\,(x+h)^2 - 5\,(x+h) + 32 = 2\,(x^2 + 2\,x\,h + h^2) - 5\,x - 5\,h + 32 = &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
::&amp;lt;math&amp;gt; = {\color{Red} {2\,x^2}} + 4\,x\,h + 2\,h^2 {\color{Red} {- 5\,x}} - 5\,h {\color{Red} {+ 32}} = 2\,h^2 + 4\,x\,h - 5\,h + ({\color{Red} {2\,x^2}} {\color{Red} {- 5\,x}} {\color{Red} {+ 32}}) &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
I sista raden ovan har vi bara ordnat om termerna (separerat &amp;lt;math&amp;gt; h &amp;lt;/math&amp;gt;-termerna) för att bättre kunna se hur nästa uttryck ska förenklas:&lt;br /&gt;
&lt;br /&gt;
::&amp;lt;math&amp;gt; \Delta y = f(x + h) \, - \, {\color{Red} {f(x)}} = 2\,h^2 + 4\,x\,h - 5\,h &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
::&amp;lt;math&amp;gt; {\Delta y \over \Delta x} = {2\,h^2 + 4\,x\,h - 5\,h \over h} = {h\,(2\,h + 4\,x - 5) \over h} = 2\,h + 4\,x - 5 &amp;lt;/math&amp;gt;&lt;/div&gt;</summary>
		<author><name>Taifun</name></author>	</entry>

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