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 <question type="category"><category><text>Matematika I // Matematicas I/Aritmetika Tresnak // Herramientas algebraicas</text></category></question>
 
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      <text>Pregunta_13_a</text>
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      <text><![CDATA[<p><span style="font-size: small;">Adieraz ezazu ingurune moduan <strong>4</strong> zenbakitik hiru unitate baino distantzia txikiagora dauden zenbaki errealen multzoa.<br /></span></p>
<p> </p>
<p><span style="font-size: small;">Expresa en forma de entorno el conjunto de números reales que disten de <strong>4</strong> en menos de tres unidades.</span></p>
<p> </p>
<p><span style="font-size: small;">Ingurunea / Entorno E<sub>{#1}</sub>({#2})</span></p>]]></text>
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            <![CDATA[{:SA:=4}]]>
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