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Loulou2672
@Loulou2672
May 2019
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Bonjour, je suis bloqué à cet exercice:
Soit F une fonction linéaire et G une fonction affine telles que F(2) = G(2) = 4 et F(3) = -G(3). Combien vaut G(1) ?
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F est linéaire donc f(x)=ax
f(2)=4 donc a*2=4 donc a=2
donc f(x)=2x
g est affine donc g(x)=ax+b
a=(g(3)-g(2))/(3-2
a=(-6-4)/1
a=-10
b=g(2)-2a
b=4+20=24
donc g(x)=-10x+24
ainsi
g(1)=14
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Lista de comentários
f(2)=4 donc a*2=4 donc a=2
donc f(x)=2x
g est affine donc g(x)=ax+b
a=(g(3)-g(2))/(3-2
a=(-6-4)/1
a=-10
b=g(2)-2a
b=4+20=24
donc g(x)=-10x+24
ainsi g(1)=14