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0Marine
@0Marine
April 2019
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Salut,
J'aurai besoin d'aide pour calculer f'(2) avec la fonction suivante : f(x)=x(x-1).
(j'utilise la méthode
)
Merci d'avance
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danielwenin
Verified answer
F(2+h) = (2+h)² -(2+h) = (2+h)(1+h) et f(2) = 2
f(2+h) - f(2) = h² + 3h + 2 - 2 = h² + 3h
et (f(2+h) - f(2))/h = h+3
f'(2) = lim0(f(2+h) - f(2))/h = lim 0 (h+3) = 3
1 votes
Thanks 1
0Marine
Merci bien ;))
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Verified answer
F(2+h) = (2+h)² -(2+h) = (2+h)(1+h) et f(2) = 2f(2+h) - f(2) = h² + 3h + 2 - 2 = h² + 3h
et (f(2+h) - f(2))/h = h+3
f'(2) = lim0(f(2+h) - f(2))/h = lim 0 (h+3) = 3