Bonsoir, svp aidez moi urgent ! un seul exercice pour demain ! merci d'avance.... Pergunta de ideia deFlaviiie

Flaviiie @Flaviiie

April 2019 1 51 Report

Bonsoir, svp aidez moi urgent ! un seul exercice pour demain ! merci d'avance

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ED = racine ( EC² + CD²)
   = racine ( (2.5² + 5²) = racine ( (5/2)² + 25 ) = racine ( 25 / 4 +25 )
   =racine (125/4)
   = racine (125) / 2 = 5 racine (5) /2

BF = BE + ED = 5/2 + 5 racine (5) /2 = ( 5 + 5 racine( 5) ) / 2

BF / BA = $\frac{5 + 5 \sqrt5}{2} * \frac{1}{5} = \frac{1 + 1 \sqrt5}{2}$

   ~1.618

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flaviiie merci

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Svp aidez moi je ne comprends pas, merciii

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