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Emma1997
@Emma1997
April 2019
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Bonsoir, comment je fait pour développer cette fonction :
f(x) = ( x - 0.5)² - ( x² - 0.5 )
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anylor
f(x) = ( x - 0.5)² - ( x² - 0.5 )
tu te sers de l'identité remarquable (a-b)² pour développer
et on change le signe à l'intérieur de la 2nde parenthèse car il y a le signe - devant )
x² - 2*0.5*x + 0.5² - x² + 0,5 =
x² - x + 0.25 - x² + 0.5 =
f(x) = 0, 75 - x
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J'ai juste une petite question, je suis en seconde et je me demande combien de grande partie doit comporter une dissertation ?
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tu te sers de l'identité remarquable (a-b)² pour développer
et on change le signe à l'intérieur de la 2nde parenthèse car il y a le signe - devant )
x² - 2*0.5*x + 0.5² - x² + 0,5 =
x² - x + 0.25 - x² + 0.5 =
f(x) = 0, 75 - x