Skillnad mellan versioner av "1.7 Lathund till Potenser Webbversion"
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| (30 mellanliggande versioner av samma användare visas inte) | |||
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{{Not selected tab|[[1.7 Övningar till Potenser|Övningar]]}}  | {{Not selected tab|[[1.7 Övningar till Potenser|Övningar]]}}  | ||
| − | {{Selected tab|[[1.7 Lathund till Potenser|Lathund Webb]]}}  | + | {{Selected tab|[[1.7 Lathund till Potenser Webbversion|Lathund Webb]]}}  | 
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| − | {{Not selected tab|[[1.7 Lathund till Potenser   | + | {{Not selected tab|[[1.7 Lathund till Potenser Appversion|Lathund App]]}}  | 
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== <b><span style="color:#931136">Potens</span></b> ==  | == <b><span style="color:#931136">Potens</span></b> ==  | ||
<br />  | <br />  | ||
<table>  | <table>  | ||
| − | <tr><td><div class="  | + | <tr>  | 
| − | <big>  | + |   <td>[[Image: Potens Bas Exponent_80.jpg]]</td>  | 
| + |   <td>           <div class="ovnE">  | ||
| + | <big>Potens med positiv exponent<span style="color:black">:</span>  | ||
| − | + | <math> \quad\;\;\; 2\,^{\color{Red} 3} \; = \;\; \underbrace{2 \, \cdot \, 2 \, \cdot \, 2}_{{\color{Red} 3}\;\times} \; = \; 8</math>    | |
| − | <span style="color:#931136">Potens</span> = upprepad multiplikation  | + | <b><span style="color:#931136">Potens</span></b> = upprepad <b><span style="color:red">multiplikation</span></b>  | 
av <math> \, 2 \, </math> med sig själv, <math> \, {\color{Red} 3} \, </math> gånger.    | av <math> \, 2 \, </math> med sig själv, <math> \, {\color{Red} 3} \, </math> gånger.    | ||
| − | </big></div></td>  | + | </big></div>  | 
| − |    <td><div class="  | + | </td>  | 
| − | <  | + | </tr>  | 
| + | </table>  | ||
| + | <br />  | ||
| + | <table>  | ||
| + | <tr>  | ||
| + |    <td><div class="ovnA">  | ||
| + | <big>Potens med exponenten <math> \, {\color{Red} 0} \, </math><span style="color:black">:</span>  | ||
| − | + | <math> \qquad\quad \displaystyle 2\,^{\color{Red} 0} \;\; = \;\; 1 </math>   | |
| + | </big></div>  | ||
| − | |||
| − | <  | + | |
| − | </div>  | + | |
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| + | |||
| + | |||
| + | </td>  | ||
| + |   <td>           <div class="ovnC">  | ||
| + | <big>Potens med negativ exponent<span style="color:black">:</span>  | ||
| + | |||
| + | <math> \qquad \displaystyle 2\,^{\color{Red} {-3}} \; = \;\; \frac{1}{2\,^{\color{Red} {3}}} \; = \; \frac{1}{8} \quad </math>    | ||
| + | |||
| + | <b><span style="color:red">Invertera</span></b> potensen med positiv <math> \quad </math>  | ||
| + | |||
| + | exponent.   | ||
| + | |||
| + | ----  | ||
| + | |||
| + | Att <b><span style="color:red">"invertera"</span></b> t.ex. <math> \, 10 \, </math> ger <math> \, \displaystyle {1 \over 10} \; </math>.  | ||
| + | </big></div>  | ||
</td>  | </td>  | ||
| − | |||
</tr>  | </tr>  | ||
</table>  | </table>  | ||
| Rad 73: | Rad 103: | ||
== <small><b><span style="color:#931136">Definition:</span></b></small> ==  | == <small><b><span style="color:#931136">Definition:</span></b></small> ==  | ||
| − | :  | + | <big>  | 
| + | <b><span style="color:#931136"><math> a \cdot 10\,^n \; </math></span></b> kallas <b><span style="color:#931136">grundpotensform</span></b> om <b><span style="color:#931136"><math> n \, </math></span></b> är heltal och <math> \; 1 \leq </math> <b><span style="color:#931136"><math> a </math></span></b> <math> < 10 \; </math>.  | ||
| + | |||
| + | Dvs <b><span style="color:#931136"><math> \, a \, </math></span></b> måste vara mellan <math> \, 1,\ldots \, </math> och <math> \, 9,\ldots \; </math>.</big>  | ||
</div>  | </div>  | ||
| Rad 83: | Rad 116: | ||
| − | [[Matte:Copyrights|Copyright]] ©   | + | [[Matte:Copyrights|Copyright]] © 2019 [https://www.techpages.se <b><span style="color:blue">TechPages AB</span></b>]. All Rights Reserved.  | 
Nuvarande version från 26 september 2019 kl. 10.15
| Genomgång Potenser | Genomgång Grundpotensform | Quiz | Övningar | Lathund Webb | 
| Lathund App | 
Potens
Potens med exponenten \( \, {\color{Red} 0} \, \): \( \qquad\quad \displaystyle 2\,^{\color{Red} 0} \;\; = \;\; 1 \) 
 
 
 
 
 
  | 
              Potens med negativ exponent: \( \qquad \displaystyle 2\,^{\color{Red} {-3}} \; = \;\; \frac{1}{2\,^{\color{Red} {3}}} \; = \; \frac{1}{8} \quad \) Invertera potensen med positiv \( \quad \) exponent. Att "invertera" t.ex. \( \, 10 \, \) ger \( \, \displaystyle {1 \over 10} \; \).  | 
Potenslagarna
Första potenslagen: \( \qquad\qquad\quad\;\, a^x \cdot a^y \; = \; a\,^{x \, + \, y} \qquad\qquad \)
Andra potenslagen: \( \qquad\qquad\qquad\;\;\; \displaystyle {a^x \over a^y} \; = \; a\,^{x \, - \, y} \qquad\qquad \)
Tredje potenslagen: \( \qquad\qquad\qquad \displaystyle {(a^x)^y} \; = \; a\,^{x \, \cdot \, y} \qquad\qquad \)
Lagen om nollte potens: \( \qquad\qquad\quad\;\;\, a\,^0 \; = \; 1 \qquad\qquad \)
Lagen om negativ exponent: \( \qquad\quad\;\;\; a\,^{-x} \; = \; \displaystyle {1 \over a\,^x} \qquad\qquad \)
Potens av en produkt: \( \qquad\qquad\;\, (a \cdot b)\,^x \; = \; a\,^x \cdot b\,^x \qquad\qquad \)
Potens av en kvot: \( \qquad\qquad\qquad\, \left(\displaystyle {a \over b}\right)^x \; = \; \displaystyle {a\,^x \over b\,^x} \qquad\qquad \)
Grundpotensform
Definition:
\( a \cdot 10\,^n \; \) kallas grundpotensform om \( n \, \) är heltal och \( \; 1 \leq \) \( a \) \( < 10 \; \).
Dvs \( \, a \, \) måste vara mellan \( \, 1,\ldots \, \) och \( \, 9,\ldots \; \).
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