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<table style="width: 400px; height: 96px; color: #000066; border: 4px solid #000066; float: none; text-align: left; vertical-align: top; background-image: url('http://www.insmilaifontanals.cat/none'); background-color: #ffffcc;" border="4" frame="void" rules="none" align="center"> <tbody> <tr> <td style="color: #ff6600; vertical-align: top; border-style: none; text-align: center; background-image: none; background-color: #000066;" valign="top" width="100%"><span style="font-size: large; color: #ffff99;">Arrels i exponents fraccionaris</span></td> </tr> <tr style="font-weight: bold;" align="justify"> <td valign="top" width="100%"><span style="font-size: small; color: #000080;">L'arrel d'índex n d'un nombre sempre es pot escriure com aquest nombre elevat a un exponent de denominador n:</span><br /><br /> <div style="text-align: center;"><span class="nolink" style="font-size: small; color: #000080;">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mroot mathcolor=¨#00007F¨»«msup»«mi mathvariant=¨bold¨»x«/mi»«mi mathvariant=¨bold¨»p«/mi»«/msup»«mi mathvariant=¨bold¨»n«/mi»«/mroot»«mo mathcolor=¨#00007F¨»§#160;«/mo»«mo mathcolor=¨#00007F¨»=«/mo»«msup mathcolor=¨#00007F¨»«mi mathvariant=¨bold¨ mathcolor=¨#00007F¨»x«/mi»«mfrac»«mi mathvariant=¨bold¨»p«/mi»«mi mathvariant=¨bold¨»n«/mi»«/mfrac»«/msup»«/math»</span><br /><span style="font-size: small; color: #000080;">Exemple: </span><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mroot»«mn»81«/mn»«mn»5«/mn»«/mroot»«mo»§nbsp;«/mo»«mo»=«/mo»«mo»§nbsp;«/mo»«mroot»«msup»«mn»3«/mn»«mn»4«/mn»«/msup»«mn»5«/mn»«/mroot»«mo»§nbsp;«/mo»«mo»=«/mo»«mo»§nbsp;«/mo»«msup»«mn»3«/mn»«mfrac»«mn»4«/mn»«mn»5«/mn»«/mfrac»«/msup»«/math»</span></div> </td> </tr> </tbody> </table> <p><br /><br /></p>
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