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Sagot :

AYUDA

bjr

f(x) = (2x + 3) (x² - 5x +1)

u = 2x + 3 => u' = 2

v = x² - 5x + 1 => v' = 2x - 5

f'(x) = u'v + uv' = 2(x² - 5x + 1) + (2x+3) (2x-5)

= 2x² - 10x + 2 + 4x² - 10x + 6x - 15

= 6x² - 14x - 13

si pas d'erreur de calcul

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