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            <Attribute name="description">Nous pouvons simplifier √(1/200) en déterminant des carrés parfaits qui sont des multiples de 200. On commence par écrire cette fraction sans radical au dénominateur. Pour cela, on multiplie le numérateur et le dénominateur par √2. On peut alors soit repérer directement le plus grand multiple carré parfait, soit on décompose 200 en un produit de  facteurs premiers et on observe des facteurs qui se répètent. </Attribute>
            
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            <video:description>Nous pouvons simplifier √(1/200) en déterminant des carrés parfaits qui sont des multiples de 200. On commence par écrire cette fraction sans radical au dénominateur. Pour cela, on multiplie le numérateur et le dénominateur par √2. On peut alors soit repérer directement le plus grand multiple carré parfait, soit on décompose 200 en un produit de  facteurs premiers et on observe des facteurs qui se répètent. </video:description>
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            <Attribute name="title">Calculer une puissance fractionnaire</Attribute>
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